51315503415 has 64 divisors (see below), whose sum is σ = 90630904320. Its totient is φ = 24586467840.

The previous prime is 51315503401. The next prime is 51315503429. The reversal of 51315503415 is 51430551315.

It is an interprime number because it is at equal distance from previous prime (51315503401) and next prime (51315503429).

It is not a de Polignac number, because 51315503415 - 2⁵ = 51315503383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7136452 + ... + 7143638.

It is an arithmetic number, because the mean of its divisors is an integer number (1416107880).

Almost surely, 2^51315503415 is an apocalyptic number.

51315503415 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51315503415 is a deficient number, since it is larger than the sum of its proper divisors (39315400905).

51315503415 is a wasteful number, since it uses less digits than its factorization.

51315503415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712.

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 51315503415 in words is "fifty-one billion, three hundred fifteen million, five hundred three thousand, four hundred fifteen".