51211428870204 has 36 divisors (see below), whose sum is σ = 129459911622496. Its totient is φ = 17069315882688.

The previous prime is 51211428870127. The next prime is 51211428870209. The reversal of 51211428870204 is 40207882411215.

51211428870204 is a `hidden beast` number, since 5 + 1 + 2 + 11 + 428 + 8 + 7 + 0 + 204 = 666.

51211428870204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×51211428870204² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51211428870204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51211428870209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47813284 + ... + 48872619.

Almost surely, 2^{51211428870204} is an apocalyptic number.

It is an amenable number.

51211428870204 is an abundant number, since it is smaller than the sum of its proper divisors (78248482752292).

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

51211428870204 is a wasteful number, since it uses less digits than its factorization.

51211428870204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96700626 (or 96700621 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 45.

The spelling of 51211428870204 in words is "fifty-one trillion, two hundred eleven billion, four hundred twenty-eight million, eight hundred seventy thousand, two hundred four".