31233004139 has 4 divisors (see below), whose sum is σ = 32077139424. Its totient is φ = 30388868856.

The previous prime is 31233004097. The next prime is 31233004151. The reversal of 31233004139 is 93140033213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31233004139 is a prime.

It is a super-2 number, since 2×31233004139² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31233004189) 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, 422067587 + ... + 422067660.

It is an arithmetic number, because the mean of its divisors is an integer number (8019284856).

Almost surely, 2^31233004139 is an apocalyptic number.

31233004139 is a deficient number, since it is larger than the sum of its proper divisors (844135285).

31233004139 is an equidigital number, since it uses as much as digits as its factorization.

31233004139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844135284.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 31233004139 in words is "thirty-one billion, two hundred thirty-three million, four thousand, one hundred thirty-nine".