51113615 has 12 divisors (see below), whose sum is σ = 71350776. Its totient is φ = 35049168.

The previous prime is 51113609. The next prime is 51113633. The reversal of 51113615 is 51631115.

It is not a de Polignac number, because 51113615 - 2⁴ = 51113599 is a prime.

It is a super-2 number, since 2×51113615² = 5225203276736450, 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 11 ways as a sum of consecutive naturals, for example, 104069 + ... + 104558.

It is an arithmetic number, because the mean of its divisors is an integer number (5945898).

Almost surely, 2^51113615 is an apocalyptic number.

51113615 is a deficient number, since it is larger than the sum of its proper divisors (20237161).

51113615 is a wasteful number, since it uses less digits than its factorization.

51113615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208646 (or 208639 counting only the distinct ones).

The product of its digits is 450, while the sum is 23.

The square root of 51113615 is about 7149.3786443299. The cubic root of 51113615 is about 371.1181538943.

The spelling of 51113615 in words is "fifty-one million, one hundred thirteen thousand, six hundred fifteen".