51130815 has 16 divisors (see below), whose sum is σ = 86622048. Its totient is φ = 25665536.

The previous prime is 51130789. The next prime is 51130831. The reversal of 51130815 is 51803115.

It is a cyclic number.

It is not a de Polignac number, because 51130815 - 2¹¹ = 51128767 is a prime.

It is a super-2 number, since 2×51130815² = 5228720485128450, which contains 22 as substring.

It is a congruent number.

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, 100002 + ... + 100511.

It is an arithmetic number, because the mean of its divisors is an integer number (5413878).

Almost surely, 2^51130815 is an apocalyptic number.

51130815 is a deficient number, since it is larger than the sum of its proper divisors (35491233).

51130815 is a wasteful number, since it uses less digits than its factorization.

51130815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200538.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 51130815 is about 7150.5814448896. The cubic root of 51130815 is about 371.1597769621.

The spelling of 51130815 in words is "fifty-one million, one hundred thirty thousand, eight hundred fifteen".