31214551213 has 4 divisors (see below), whose sum is σ = 31304507040. Its totient is φ = 31124595388.

The previous prime is 31214551201. The next prime is 31214551219. The reversal of 31214551213 is 31215541213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31214551213 - 2⁹ = 31214550701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31214551219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44977393 + ... + 44978086.

It is an arithmetic number, because the mean of its divisors is an integer number (7826126760).

Almost surely, 2^31214551213 is an apocalyptic number.

It is an amenable number.

31214551213 is a deficient number, since it is larger than the sum of its proper divisors (89955827).

31214551213 is an equidigital number, since it uses as much as digits as its factorization.

31214551213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89955826.

The product of its digits is 3600, while the sum is 28.

The spelling of 31214551213 in words is "thirty-one billion, two hundred fourteen million, five hundred fifty-one thousand, two hundred thirteen".