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31352521663 = 472243297403
BaseRepresentation
bin11101001100110000…
…011000001110111111
32222221000022010022001
4131030300120032333
51003202221143123
622223025203131
72156642015461
oct351460301677
988830263261
1031352521663
1112329754631
1260aba904a7
132c5865c188
141735d1c131
15c377410ad
hex74cc183bf

31352521663 has 8 divisors (see below), whose sum is σ = 32033979648. Its totient is φ = 30671663064.

The previous prime is 31352521649. The next prime is 31352521679. The reversal of 31352521663 is 36612525313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31352521663 - 225 = 31318967231 is a prime.

It is a super-2 number, since 2×313525216632 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31352521163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43281 + ... + 254122.

It is an arithmetic number, because the mean of its divisors is an integer number (4004247456).

Almost surely, 231352521663 is an apocalyptic number.

31352521663 is a deficient number, since it is larger than the sum of its proper divisors (681457985).

31352521663 is a wasteful number, since it uses less digits than its factorization.

31352521663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299693.

The product of its digits is 97200, while the sum is 37.

The spelling of 31352521663 in words is "thirty-one billion, three hundred fifty-two million, five hundred twenty-one thousand, six hundred sixty-three".

Divisors: 1 47 2243 105421 297403 13977941 667074929 31352521663