31040100312 has 32 divisors (see below), whose sum is σ = 83569501680. Its totient is φ = 9550800000.

The previous prime is 31040100307. The next prime is 31040100313. The reversal of 31040100312 is 21300104013.

It is a junction number, because it is equal to n+sod(n) for n = 31040100291 and 31040100300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040100313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49743439 + ... + 49744062.

Almost surely, 2^31040100312 is an apocalyptic number.

It is an amenable number.

31040100312 is an abundant number, since it is smaller than the sum of its proper divisors (52529401368).

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

31040100312 is a wasteful number, since it uses less digits than its factorization.

31040100312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99487523 (or 99487519 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31040100312 its reverse (21300104013), we get a palindrome (52340204325).

The spelling of 31040100312 in words is "thirty-one billion, forty million, one hundred thousand, three hundred twelve".