31225252213 has 32 divisors (see below), whose sum is σ = 33915277440. Its totient is φ = 28659225600.

The previous prime is 31225252193. The next prime is 31225252229.

31225252213 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31225252213 - 2⁵ = 31225252181 is a prime.

It is a super-2 number, since 2×31225252213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31225252013) 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, 19191106 + ... + 19192732.

It is an arithmetic number, because the mean of its divisors is an integer number (1059852420).

Almost surely, 2^31225252213 is an apocalyptic number.

It is an amenable number.

31225252213 is a deficient number, since it is larger than the sum of its proper divisors (2690025227).

31225252213 is a wasteful number, since it uses less digits than its factorization.

31225252213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957.

The product of its digits is 7200, while the sum is 28.

The spelling of 31225252213 in words is "thirty-one billion, two hundred twenty-five million, two hundred fifty-two thousand, two hundred thirteen".