51115065 has 16 divisors (see below), whose sum is σ = 81960000. Its totient is φ = 27202752.

The previous prime is 51115049. The next prime is 51115079. The reversal of 51115065 is 56051115.

It is not a de Polignac number, because 51115065 - 2⁴ = 51115049 is a prime.

It is a super-2 number, since 2×51115065² = 5225499739908450, 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, 4071 + ... + 10899.

It is an arithmetic number, because the mean of its divisors is an integer number (5122500).

Almost surely, 2^51115065 is an apocalyptic number.

It is an amenable number.

51115065 is a deficient number, since it is larger than the sum of its proper divisors (30844935).

51115065 is a wasteful number, since it uses less digits than its factorization.

51115065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7336.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 51115065 is about 7149.4800510247. The cubic root of 51115065 is about 371.1216631761.

It can be divided in two parts, 511 and 15065, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 51115065 in words is "fifty-one million, one hundred fifteen thousand, sixty-five".