51020520515 has 16 divisors (see below), whose sum is σ = 62271905760. Its totient is φ = 40118442240.

The previous prime is 51020520493. The next prime is 51020520521. The reversal of 51020520515 is 51502502015.

51020520515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51020520515 - 2⁸ = 51020520259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3332057 + ... + 3347333.

It is an arithmetic number, because the mean of its divisors is an integer number (3891994110).

Almost surely, 2^51020520515 is an apocalyptic number.

51020520515 is a deficient number, since it is larger than the sum of its proper divisors (11251385245).

51020520515 is a wasteful number, since it uses less digits than its factorization.

51020520515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26662.

The product of its (nonzero) digits is 2500, while the sum is 26.

The spelling of 51020520515 in words is "fifty-one billion, twenty million, five hundred twenty thousand, five hundred fifteen".