31431504212 has 24 divisors (see below), whose sum is σ = 55590169320. Its totient is φ = 15548825600.

The previous prime is 31431504211. The next prime is 31431504227. The reversal of 31431504212 is 21240513413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5589655696 + 25841848516 = 74764^2 + 160754^2 .

It is a super-5 number, since 5×31431504212⁵ (a number of 54 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431504211) 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, 541628 + ... + 596844.

It is an arithmetic number, because the mean of its divisors is an integer number (2316257055).

Almost surely, 2^31431504212 is an apocalyptic number.

It is an amenable number.

31431504212 is a deficient number, since it is larger than the sum of its proper divisors (24158665108).

31431504212 is a wasteful number, since it uses less digits than its factorization.

31431504212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56731 (or 56729 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 31431504212 in words is "thirty-one billion, four hundred thirty-one million, five hundred four thousand, two hundred twelve".