31023432013 has 4 divisors (see below), whose sum is σ = 35455350880. Its totient is φ = 26591513148.

The previous prime is 31023431963. The next prime is 31023432067.

31023432013 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 a de Polignac number, because none of the positive numbers 2^k-31023432013 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 (31023435013) 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, 2215959423 + ... + 2215959436.

It is an arithmetic number, because the mean of its divisors is an integer number (8863837720).

Almost surely, 2^31023432013 is an apocalyptic number.

It is an amenable number.

31023432013 is a deficient number, since it is larger than the sum of its proper divisors (4431918867).

31023432013 is an equidigital number, since it uses as much as digits as its factorization.

31023432013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431918866.

The product of its (nonzero) digits is 1296, while the sum is 22.

The spelling of 31023432013 in words is "thirty-one billion, twenty-three million, four hundred thirty-two thousand, thirteen".