51012115 has 16 divisors (see below), whose sum is σ = 76320000. Its totient is φ = 31799520.

The previous prime is 51012107. The next prime is 51012119. The reversal of 51012115 is 51121015.

It is not a de Polignac number, because 51012115 - 2³ = 51012107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51012119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65865 + ... + 66634.

It is an arithmetic number, because the mean of its divisors is an integer number (4770000).

Almost surely, 2^51012115 is an apocalyptic number.

51012115 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51012115 is a deficient number, since it is larger than the sum of its proper divisors (25307885).

51012115 is a wasteful number, since it uses less digits than its factorization.

51012115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132522.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 51012115 is about 7142.2765978363. The cubic root of 51012115 is about 370.8723390636.

Subtracting 51012115 from its reverse (51121015), we obtain a square (108900 = 330²).

The spelling of 51012115 in words is "fifty-one million, twelve thousand, one hundred fifteen".