51020402015 has 24 divisors (see below), whose sum is σ = 67387499424. Its totient is φ = 37055480000.

The previous prime is 51020401987. The next prime is 51020402021.

51020402015 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51020402015 - 2⁸ = 51020401759 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 392765 + ... + 506265.

It is an arithmetic number, because the mean of its divisors is an integer number (2807812476).

Almost surely, 2^51020402015 is an apocalyptic number.

51020402015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51020402015 is a deficient number, since it is larger than the sum of its proper divisors (16367097409).

51020402015 is a wasteful number, since it uses less digits than its factorization.

51020402015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114271 (or 114260 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The spelling of 51020402015 in words is "fifty-one billion, twenty million, four hundred two thousand, fifteen".