51113515 has 16 divisors (see below), whose sum is σ = 66794400. Its totient is φ = 37400832.

The previous prime is 51113507. The next prime is 51113527. The reversal of 51113515 is 51531115.

It is a cyclic number.

It is not a de Polignac number, because 51113515 - 2³ = 51113507 is a prime.

It is a super-2 number, since 2×51113515² = 5225182831310450, which contains 22 as substring.

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, 6522 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (4174650).

Almost surely, 2^51113515 is an apocalyptic number.

51113515 is a deficient number, since it is larger than the sum of its proper divisors (15680885).

51113515 is a wasteful number, since it uses less digits than its factorization.

51113515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18606.

The product of its digits is 375, while the sum is 22.

The square root of 51113515 is about 7149.3716507117. The cubic root of 51113515 is about 371.1179118724.

The spelling of 51113515 in words is "fifty-one million, one hundred thirteen thousand, five hundred fifteen".