51108915 has 32 divisors (see below), whose sum is σ = 96074496. Its totient is φ = 22872960.

The previous prime is 51108913. The next prime is 51108931. The reversal of 51108915 is 51980115.

It is not a de Polignac number, because 51108915 - 2¹ = 51108913 is a prime.

It is a super-2 number, since 2×51108915² = 5224242384954450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51108913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9769 + ... + 14058.

It is an arithmetic number, because the mean of its divisors is an integer number (3002328).

Almost surely, 2^51108915 is an apocalyptic number.

51108915 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51108915 is a deficient number, since it is larger than the sum of its proper divisors (44965581).

51108915 is a wasteful number, since it uses less digits than its factorization.

51108915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23859.

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 51108915 is about 7149.0499368797. The cubic root of 51108915 is about 371.1067785247.

The spelling of 51108915 in words is "fifty-one million, one hundred eight thousand, nine hundred fifteen".