51515030425 has 24 divisors (see below), whose sum is σ = 66522885120. Its totient is φ = 39529593600.

The previous prime is 51515030393. The next prime is 51515030491. The reversal of 51515030425 is 52403051515.

It is not a de Polignac number, because 51515030425 - 2⁵ = 51515030393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 206545 + ... + 381694.

It is an arithmetic number, because the mean of its divisors is an integer number (2771786880).

Almost surely, 2^51515030425 is an apocalyptic number.

It is an amenable number.

51515030425 is a deficient number, since it is larger than the sum of its proper divisors (15007854695).

51515030425 is a wasteful number, since it uses less digits than its factorization.

51515030425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588393 (or 588388 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 51515030425 in words is "fifty-one billion, five hundred fifteen million, thirty thousand, four hundred twenty-five".