31012332131 has 16 divisors (see below), whose sum is σ = 33935821440. Its totient is φ = 28106326080.

The previous prime is 31012332103. The next prime is 31012332137. The reversal of 31012332131 is 13123321013.

It is a cyclic number.

It is not a de Polignac number, because 31012332131 - 2⁶ = 31012332067 is a prime.

It is a super-2 number, since 2×31012332131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012332137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7935680 + ... + 7939586.

It is an arithmetic number, because the mean of its divisors is an integer number (2120988840).

Almost surely, 2^31012332131 is an apocalyptic number.

31012332131 is a deficient number, since it is larger than the sum of its proper divisors (2923489309).

31012332131 is a wasteful number, since it uses less digits than its factorization.

31012332131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5954.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31012332131 its reverse (13123321013), we get a palindrome (44135653144).

The spelling of 31012332131 in words is "thirty-one billion, twelve million, three hundred thirty-two thousand, one hundred thirty-one".