31004340312 has 64 divisors (see below), whose sum is σ = 85165718400. Its totient is φ = 9327651840.

The previous prime is 31004340281. The next prime is 31004340317. The reversal of 31004340312 is 21304340013.

It is a super-2 number, since 2×31004340312² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004340317) 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, 385753 + ... + 459144.

It is an arithmetic number, because the mean of its divisors is an integer number (1330714350).

Almost surely, 2^31004340312 is an apocalyptic number.

It is an amenable number.

31004340312 is an abundant number, since it is smaller than the sum of its proper divisors (54161378088).

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

31004340312 is a wasteful number, since it uses less digits than its factorization.

31004340312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845056 (or 845052 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31004340312 its reverse (21304340013), we get a palindrome (52308680325).

The spelling of 31004340312 in words is "thirty-one billion, four million, three hundred forty thousand, three hundred twelve".