51108399 has 12 divisors (see below), whose sum is σ = 74036976. Its totient is φ = 33973632.

The previous prime is 51108383. The next prime is 51108401. The reversal of 51108399 is 99380115.

It is a happy number.

It is not a de Polignac number, because 51108399 - 2⁴ = 51108383 is a prime.

It is a super-2 number, since 2×51108399² = 5224136896686402, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51108319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4867 + ... + 11220.

It is an arithmetic number, because the mean of its divisors is an integer number (6169748).

Almost surely, 2^51108399 is an apocalyptic number.

51108399 is a deficient number, since it is larger than the sum of its proper divisors (22928577).

51108399 is a wasteful number, since it uses less digits than its factorization.

51108399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16446 (or 16443 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 51108399 is about 7149.0138480772. The cubic root of 51108399 is about 371.1055296118.

The spelling of 51108399 in words is "fifty-one million, one hundred eight thousand, three hundred ninety-nine".