51205053213125 has 40 divisors (see below), whose sum is σ = 73142286026304. Its totient is φ = 35104537440000.

The previous prime is 51205053213059. The next prime is 51205053213157. The reversal of 51205053213125 is 52131235050215.

It is a happy number.

It is not a de Polignac number, because 51205053213125 - 2³² = 51200758245829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19275629 + ... + 21770621.

Almost surely, 2^{51205053213125} is an apocalyptic number.

It is an amenable number.

51205053213125 is a deficient number, since it is larger than the sum of its proper divisors (21937232813179).

51205053213125 is an equidigital number, since it uses as much as digits as its factorization.

51205053213125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499711 (or 2499696 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 51205053213125 in words is "fifty-one trillion, two hundred five billion, fifty-three million, two hundred thirteen thousand, one hundred twenty-five".