51220504375 has 20 divisors (see below), whose sum is σ = 64233138816. Its totient is φ = 40830440000.

The previous prime is 51220504367. The next prime is 51220504411. The reversal of 51220504375 is 57340502215.

It is not a de Polignac number, because 51220504375 - 2³ = 51220504367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51220504375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29802 + ... + 321448.

Almost surely, 2^51220504375 is an apocalyptic number.

51220504375 is a deficient number, since it is larger than the sum of its proper divisors (13012634441).

51220504375 is an equidigital number, since it uses as much as digits as its factorization.

51220504375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291948 (or 291933 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 34.

The spelling of 51220504375 in words is "fifty-one billion, two hundred twenty million, five hundred four thousand, three hundred seventy-five".