31520041212 has 24 divisors (see below), whose sum is σ = 80232832512. Its totient is φ = 9551527600.

The previous prime is 31520041193. The next prime is 31520041219. The reversal of 31520041212 is 21214002513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31520041219) 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, 119393964 + ... + 119394227.

It is an arithmetic number, because the mean of its divisors is an integer number (3343034688).

Almost surely, 2^31520041212 is an apocalyptic number.

It is an amenable number.

31520041212 is an abundant number, since it is smaller than the sum of its proper divisors (48712791300).

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

31520041212 is a wasteful number, since it uses less digits than its factorization.

31520041212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238788209 (or 238788207 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 31520041212 its reverse (21214002513), we get a palindrome (52734043725).

The spelling of 31520041212 in words is "thirty-one billion, five hundred twenty million, forty-one thousand, two hundred twelve".