51868311 has 16 divisors (see below), whose sum is σ = 75738240. Its totient is φ = 31313120.

The previous prime is 51868283. The next prime is 51868331. The reversal of 51868311 is 11386815.

It is a cyclic number.

It is not a de Polignac number, because 51868311 - 2⁵ = 51868279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51868331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5956 + ... + 11798.

It is an arithmetic number, because the mean of its divisors is an integer number (4733640).

Almost surely, 2^51868311 is an apocalyptic number.

51868311 is a deficient number, since it is larger than the sum of its proper divisors (23869929).

51868311 is a wasteful number, since it uses less digits than its factorization.

51868311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126.

The product of its digits is 5760, while the sum is 33.

The square root of 51868311 is about 7201.9657733149. The cubic root of 51868311 is about 372.9357655682.

The spelling of 51868311 in words is "fifty-one million, eight hundred sixty-eight thousand, three hundred eleven".