51131534004 has 36 divisors (see below), whose sum is σ = 129918857796. Its totient is φ = 16955532288.

The previous prime is 51131533993. The next prime is 51131534039. The reversal of 51131534004 is 40043513115.

It is a happy number.

51131534004 is a `hidden beast` number, since 5 + 1 + 1 + 315 + 340 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30495636900 + 20635897104 = 174630^2 + 143652^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×51131534004² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3672639 + ... + 3686534.

It is an arithmetic number, because the mean of its divisors is an integer number (3608857161).

Almost surely, 2^51131534004 is an apocalyptic number.

It is an amenable number.

51131534004 is an abundant number, since it is smaller than the sum of its proper divisors (78787323792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51131534004 is a wasteful number, since it uses less digits than its factorization.

51131534004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7359376 (or 7359371 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 51131534004 in words is "fifty-one billion, one hundred thirty-one million, five hundred thirty-four thousand, four".