139537338531 has 16 divisors (see below), whose sum is σ = 196084022400. Its totient is φ = 88019880768.

The previous prime is 139537338509. The next prime is 139537338559. The reversal of 139537338531 is 135833735931.

It is a happy number.

It is not a de Polignac number, because 139537338531 - 2⁷ = 139537338403 is a prime.

It is a super-2 number, since 2×139537338531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139537338571) 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, 1466881 + ... + 1559106.

It is an arithmetic number, because the mean of its divisors is an integer number (12255251400).

Almost surely, 2^139537338531 is an apocalyptic number.

139537338531 is a deficient number, since it is larger than the sum of its proper divisors (56546683869).

139537338531 is a wasteful number, since it uses less digits than its factorization.

139537338531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026818.

The product of its digits is 3061800, while the sum is 51.

The spelling of 139537338531 in words is "one hundred thirty-nine billion, five hundred thirty-seven million, three hundred thirty-eight thousand, five hundred thirty-one".