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31311230010 = 2351043707667
BaseRepresentation
bin11101001010010010…
…110111010000111010
32222211010121021210120
4131022102313100322
51003111133330020
622214552154110
72155631030604
oct351222672072
988733537716
1031311230010
11123084115a5
12609a098936
132c4cc32748
141730650174
15c33cd6740
hex74a4b743a

31311230010 has 16 divisors (see below), whose sum is σ = 75146952096. Its totient is φ = 8349661328.

The previous prime is 31311229993. The next prime is 31311230029. The reversal of 31311230010 is 1003211313.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521853804 + ... + 521853863.

It is an arithmetic number, because the mean of its divisors is an integer number (4696684506).

Almost surely, 231311230010 is an apocalyptic number.

31311230010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31311230010 is an abundant number, since it is smaller than the sum of its proper divisors (43835722086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311230010 is a wasteful number, since it uses less digits than its factorization.

31311230010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043707677.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31311230010 its reverse (1003211313), we get a palindrome (32314441323).

The spelling of 31311230010 in words is "thirty-one billion, three hundred eleven million, two hundred thirty thousand, ten".

Divisors: 1 2 3 5 6 10 15 30 1043707667 2087415334 3131123001 5218538335 6262246002 10437076670 15655615005 31311230010