31285131339 has 32 divisors (see below), whose sum is σ = 52718897664. Its totient is φ = 16029377280.

The previous prime is 31285131313. The next prime is 31285131379. The reversal of 31285131339 is 93313158213.

It is not a de Polignac number, because 31285131339 - 2⁵ = 31285131307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31285131297 and 31285131306.

It is not an unprimeable number, because it can be changed into a prime (31285131379) 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, 910764 + ... + 944489.

It is an arithmetic number, because the mean of its divisors is an integer number (1647465552).

Almost surely, 2^31285131339 is an apocalyptic number.

31285131339 is a deficient number, since it is larger than the sum of its proper divisors (21433766325).

31285131339 is a wasteful number, since it uses less digits than its factorization.

31285131339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855347.

The product of its digits is 58320, while the sum is 39.

The spelling of 31285131339 in words is "thirty-one billion, two hundred eighty-five million, one hundred thirty-one thousand, three hundred thirty-nine".