84725513931 has 16 divisors (see below), whose sum is σ = 118980658944. Its totient is φ = 53522925984.

The previous prime is 84725513921. The next prime is 84725513933. The reversal of 84725513931 is 13931552748.

It is not a de Polignac number, because 84725513931 - 2¹⁵ = 84725481163 is a prime.

It is a super-2 number, since 2×84725513931² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84725513933) 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, 5730496 + ... + 5745261.

It is an arithmetic number, because the mean of its divisors is an integer number (7436291184).

Almost surely, 2^84725513931 is an apocalyptic number.

84725513931 is a deficient number, since it is larger than the sum of its proper divisors (34255145013).

84725513931 is a wasteful number, since it uses less digits than its factorization.

84725513931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11475890.

The product of its digits is 907200, while the sum is 48.

The spelling of 84725513931 in words is "eighty-four billion, seven hundred twenty-five million, five hundred thirteen thousand, nine hundred thirty-one".