31144500002139 has 16 divisors (see below), whose sum is σ = 41544753204000. Its totient is φ = 20753624376576.

The previous prime is 31144500002131. The next prime is 31144500002153. The reversal of 31144500002139 is 93120000544113.

It is not a de Polignac number, because 31144500002139 - 2³ = 31144500002131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31144500002131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139469127 + ... + 139692255.

It is an arithmetic number, because the mean of its divisors is an integer number (2596547075250).

Almost surely, 2^{31144500002139} is an apocalyptic number.

31144500002139 is a deficient number, since it is larger than the sum of its proper divisors (10400253201861).

31144500002139 is a wasteful number, since it uses less digits than its factorization.

31144500002139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243934.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 31144500002139 in words is "thirty-one trillion, one hundred forty-four billion, five hundred million, two thousand, one hundred thirty-nine".