31023313212 has 48 divisors (see below), whose sum is σ = 73685808000. Its totient is φ = 10156004160.

The previous prime is 31023313177. The next prime is 31023313213. The reversal of 31023313212 is 21231332013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023313213) 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, 730539 + ... + 771837.

It is an arithmetic number, because the mean of its divisors is an integer number (1535121000).

Almost surely, 2^31023313212 is an apocalyptic number.

It is an amenable number.

31023313212 is an abundant number, since it is smaller than the sum of its proper divisors (42662494788).

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

31023313212 is a wasteful number, since it uses less digits than its factorization.

31023313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42426 (or 42424 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31023313212 its reverse (21231332013), we get a palindrome (52254645225).

The spelling of 31023313212 in words is "thirty-one billion, twenty-three million, three hundred thirteen thousand, two hundred twelve".