31224642213 has 32 divisors (see below), whose sum is σ = 44175237120. Its totient is φ = 19583657280.

The previous prime is 31224642209. The next prime is 31224642233.

31224642213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31224642213 - 2² = 31224642209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224642233) 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, 4907128 + ... + 4913486.

It is an arithmetic number, because the mean of its divisors is an integer number (1380476160).

Almost surely, 2^31224642213 is an apocalyptic number.

It is an amenable number.

31224642213 is a deficient number, since it is larger than the sum of its proper divisors (12950594907).

31224642213 is a wasteful number, since it uses less digits than its factorization.

31224642213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857.

The product of its digits is 13824, while the sum is 30.

The spelling of 31224642213 in words is "thirty-one billion, two hundred twenty-four million, six hundred forty-two thousand, two hundred thirteen".