31032212013 has 24 divisors (see below), whose sum is σ = 48917125920. Its totient is φ = 18800523360.

The previous prime is 31032211999. The next prime is 31032212017. The reversal of 31032212013 is 31021223013.

31032212013 is a `hidden beast` number, since 310 + 322 + 1 + 20 + 13 = 666.

It is not a de Polignac number, because 31032212013 - 2¹⁸ = 31031949869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032212017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221583 + ... + 333411.

It is an arithmetic number, because the mean of its divisors is an integer number (2038213580).

Almost surely, 2^31032212013 is an apocalyptic number.

31032212013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31032212013 is a deficient number, since it is larger than the sum of its proper divisors (17884913907).

31032212013 is a wasteful number, since it uses less digits than its factorization.

31032212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114649 (or 114646 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31032212013 its reverse (31021223013), we get a palindrome (62053435026).

The spelling of 31032212013 in words is "thirty-one billion, thirty-two million, two hundred twelve thousand, thirteen".