31300000131231 has 48 divisors (see below), whose sum is σ = 49070906906112. Its totient is φ = 19110720744000.

The previous prime is 31300000131223. The next prime is 31300000131233. The reversal of 31300000131231 is 13213100000313.

It is a happy number.

31300000131231 is a `hidden beast` number, since 3 + 1 + 300 + 0 + 0 + 0 + 131 + 231 = 666.

It is not a de Polignac number, because 31300000131231 - 2³ = 31300000131223 is a prime.

It is a super-4 number, since 4×31300000131231⁴ (a number of 55 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300000131233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13463596 + ... + 15616286.

It is an arithmetic number, because the mean of its divisors is an integer number (1022310560544).

Almost surely, 2^{31300000131231} is an apocalyptic number.

31300000131231 is a deficient number, since it is larger than the sum of its proper divisors (17770906774881).

31300000131231 is a wasteful number, since it uses less digits than its factorization.

31300000131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153684 (or 2153681 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31300000131231 its reverse (13213100000313), we get a palindrome (44513100131544).

The spelling of 31300000131231 in words is "thirty-one trillion, three hundred billion, one hundred thirty-one thousand, two hundred thirty-one".