51977915 has 16 divisors (see below), whose sum is σ = 68463360. Its totient is φ = 37569120.

The previous prime is 51977909. The next prime is 51977941.

51977915 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51977915 - 2⁶ = 51977851 is a prime.

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, 6356 + ... + 12014.

It is an arithmetic number, because the mean of its divisors is an integer number (4278960).

Almost surely, 2^51977915 is an apocalyptic number.

51977915 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51977915 is a deficient number, since it is larger than the sum of its proper divisors (16485445).

51977915 is a wasteful number, since it uses less digits than its factorization.

51977915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5842.

The product of its digits is 99225, while the sum is 44.

The square root of 51977915 is about 7209.5710690720. The cubic root of 51977915 is about 373.1982668473.

The spelling of 51977915 in words is "fifty-one million, nine hundred seventy-seven thousand, nine hundred fifteen".