31426915138139 has 4 divisors (see below), whose sum is σ = 32440686594240. Its totient is φ = 30413143682040.

The previous prime is 31426915138127. The next prime is 31426915138189. The reversal of 31426915138139 is 93183151962413.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31426915138139 - 2²⁸ = 31426646702683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31426915138189) 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, 506885728004 + ... + 506885728065.

It is an arithmetic number, because the mean of its divisors is an integer number (8110171648560).

Almost surely, 2^{31426915138139} is an apocalyptic number.

31426915138139 is a deficient number, since it is larger than the sum of its proper divisors (1013771456101).

31426915138139 is a wasteful number, since it uses less digits than its factorization.

31426915138139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013771456100.

The product of its digits is 4199040, while the sum is 56.

The spelling of 31426915138139 in words is "thirty-one trillion, four hundred twenty-six billion, nine hundred fifteen million, one hundred thirty-eight thousand, one hundred thirty-nine".