51507115 has 8 divisors (see below), whose sum is σ = 67427568. Its totient is φ = 37459680.

The previous prime is 51507083. The next prime is 51507133. The reversal of 51507115 is 51170515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51507115 - 2⁵ = 51507083 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 51507115.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468192 + ... + 468301.

It is an arithmetic number, because the mean of its divisors is an integer number (8428446).

Almost surely, 2^51507115 is an apocalyptic number.

51507115 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51507115 is a deficient number, since it is larger than the sum of its proper divisors (15920453).

51507115 is a wasteful number, since it uses less digits than its factorization.

51507115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936509.

The product of its (nonzero) digits is 875, while the sum is 25.

The square root of 51507115 is about 7176.8457556227. The cubic root of 51507115 is about 372.0680758560.

The spelling of 51507115 in words is "fifty-one million, five hundred seven thousand, one hundred fifteen".