31200013131 has 16 divisors (see below), whose sum is σ = 47598380544. Its totient is φ = 17807765184.

The previous prime is 31200013127. The next prime is 31200013139. The reversal of 31200013131 is 13131000213.

It is not a de Polignac number, because 31200013131 - 2² = 31200013127 is a prime.

It is a super-2 number, since 2×31200013131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31200013131.

It is not an unprimeable number, because it can be changed into a prime (31200013139) 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 15 ways as a sum of consecutive naturals, for example, 848815 + ... + 884808.

It is an arithmetic number, because the mean of its divisors is an integer number (2974898784).

Almost surely, 2^31200013131 is an apocalyptic number.

31200013131 is a deficient number, since it is larger than the sum of its proper divisors (16398367413).

31200013131 is a wasteful number, since it uses less digits than its factorization.

31200013131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734490.

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

Adding to 31200013131 its reverse (13131000213), we get a palindrome (44331013344).

The spelling of 31200013131 in words is "thirty-one billion, two hundred million, thirteen thousand, one hundred thirty-one".