51955915 has 32 divisors (see below), whose sum is σ = 70502400. Its totient is φ = 36432000.

The previous prime is 51955901. The next prime is 51955933.

51955915 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51955915 - 2¹⁵ = 51923147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260986 + ... + 261184.

It is an arithmetic number, because the mean of its divisors is an integer number (2203200).

Almost surely, 2^51955915 is an apocalyptic number.

51955915 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51955915 is a deficient number, since it is larger than the sum of its proper divisors (18546485).

51955915 is a wasteful number, since it uses less digits than its factorization.

51955915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363.

The product of its digits is 50625, while the sum is 40.

The square root of 51955915 is about 7208.0451580161. The cubic root of 51955915 is about 373.1456065299.

The spelling of 51955915 in words is "fifty-one million, nine hundred fifty-five thousand, nine hundred fifteen".