51363999 has 12 divisors (see below), whose sum is σ = 74604712. Its totient is φ = 34052400.

The previous prime is 51363989. The next prime is 51364003. The reversal of 51363999 is 99936315.

51363999 is a `hidden beast` number, since 5 + 1 + 3 + 639 + 9 + 9 = 666.

It is not a de Polignac number, because 51363999 - 2⁵ = 51363967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51363989) 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, 14137 + ... + 17394.

Almost surely, 2^51363999 is an apocalyptic number.

51363999 is a deficient number, since it is larger than the sum of its proper divisors (23240713).

51363999 is a wasteful number, since it uses less digits than its factorization.

51363999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31718 (or 31715 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 51363999 is about 7166.8681444547. The cubic root of 51363999 is about 371.7231507613.

The spelling of 51363999 in words is "fifty-one million, three hundred sixty-three thousand, nine hundred ninety-nine".