51400525021 has 16 divisors (see below), whose sum is σ = 53244449280. Its totient is φ = 49587310080.

The previous prime is 51400525019. The next prime is 51400525081. The reversal of 51400525021 is 12052500415.

It is a cyclic number.

It is not a de Polignac number, because 51400525021 - 2¹ = 51400525019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51400525081) 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, 3785781 + ... + 3799333.

It is an arithmetic number, because the mean of its divisors is an integer number (3327778080).

Almost surely, 2^51400525021 is an apocalyptic number.

It is an amenable number.

51400525021 is a deficient number, since it is larger than the sum of its proper divisors (1843924259).

51400525021 is a wasteful number, since it uses less digits than its factorization.

51400525021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 51400525021 in words is "fifty-one billion, four hundred million, five hundred twenty-five thousand, twenty-one".