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31023003210213 = 3723629891019699
BaseRepresentation
bin1110000110111000110110…
…00101100001000111100101
311001211202210102201100010210
413003130123011201013211
513031240102310211323
6145551434304210033
76351223640245110
oct703343305410745
9131752712640123
1031023003210213
1199808665a9283
123590571009919
1314405c234c181
147937428b9577
1538bea5c86293
hex1c371b1611e5

31023003210213 has 32 divisors (see below), whose sum is σ = 49329333504000. Its totient is φ = 16956386732736.

The previous prime is 31023003210197. The next prime is 31023003210233. The reversal of 31023003210213 is 31201230032013.

It is not a de Polignac number, because 31023003210213 - 24 = 31023003210197 is a prime.

It is a super-2 number, since 2×310230032102132 (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31023003210213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023003210233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29913838 + ... + 30933536.

It is an arithmetic number, because the mean of its divisors is an integer number (1541541672000).

Almost surely, 231023003210213 is an apocalyptic number.

It is an amenable number.

31023003210213 is a deficient number, since it is larger than the sum of its proper divisors (18306330293787).

31023003210213 is a wasteful number, since it uses less digits than its factorization.

31023003210213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082721.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31023003210213 its reverse (31201230032013), we get a palindrome (62224233242226).

The spelling of 31023003210213 in words is "thirty-one trillion, twenty-three billion, three million, two hundred ten thousand, two hundred thirteen".

Divisors: 1 3 7 21 23 69 161 483 62989 188967 440923 1019699 1322769 1448747 3059097 4346241 7137893 10141229 21413679 23453077 30423687 70359231 164171539 492514617 64229820311 192689460933 449608742177 1348826226531 1477285867153 4431857601459 10341001070071 31023003210213