31232123213 has 4 divisors (see below), whose sum is σ = 31304587968. Its totient is φ = 31159658460.

The previous prime is 31232123201. The next prime is 31232123249.

31232123213 is nontrivially palindromic in base 10.

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 31232123213 - 2¹⁶ = 31232057677 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 (31232123113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36231731 + ... + 36232592.

It is an arithmetic number, because the mean of its divisors is an integer number (7826146992).

Almost surely, 2^31232123213 is an apocalyptic number.

It is an amenable number.

31232123213 is a deficient number, since it is larger than the sum of its proper divisors (72464755).

31232123213 is an equidigital number, since it uses as much as digits as its factorization.

31232123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72464754.

The product of its digits is 1296, while the sum is 23.

The spelling of 31232123213 in words is "thirty-one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred thirteen".