31132213113 has 16 divisors (see below), whose sum is σ = 42043380480. Its totient is φ = 20488031616.

The previous prime is 31132213087. The next prime is 31132213153. The reversal of 31132213113 is 31131223113.

It is a happy number.

It is not a de Polignac number, because 31132213113 - 2²⁶ = 31065104249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31132213113.

It is not an unprimeable number, because it can be changed into a prime (31132213153) 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, 1615531 + ... + 1634687.

It is an arithmetic number, because the mean of its divisors is an integer number (2627711280).

Almost surely, 2^31132213113 is an apocalyptic number.

It is an amenable number.

31132213113 is a deficient number, since it is larger than the sum of its proper divisors (10911167367).

31132213113 is a wasteful number, since it uses less digits than its factorization.

31132213113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26096.

The product of its digits is 324, while the sum is 21.

Adding to 31132213113 its reverse (31131223113), we get a palindrome (62263436226).

The spelling of 31132213113 in words is "thirty-one billion, one hundred thirty-two million, two hundred thirteen thousand, one hundred thirteen".