31229493213 has 32 divisors (see below), whose sum is σ = 43160688000. Its totient is φ = 20074070016.

The previous prime is 31229493199. The next prime is 31229493227. The reversal of 31229493213 is 31239492213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31229493199) and next prime (31229493227).

It is not a de Polignac number, because 31229493213 - 2⁶ = 31229493149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31229493263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4779933 + ... + 4786461.

It is an arithmetic number, because the mean of its divisors is an integer number (1348771500).

Almost surely, 2^31229493213 is an apocalyptic number.

It is an amenable number.

31229493213 is a deficient number, since it is larger than the sum of its proper divisors (11931194787).

31229493213 is a wasteful number, since it uses less digits than its factorization.

31229493213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101.

The product of its digits is 69984, while the sum is 39.

The spelling of 31229493213 in words is "thirty-one billion, two hundred twenty-nine million, four hundred ninety-three thousand, two hundred thirteen".