51365279 has 32 divisors (see below), whose sum is σ = 66355200. Its totient is φ = 39532416.

The previous prime is 51365261. The next prime is 51365291. The reversal of 51365279 is 97256315.

It is a happy number.

It is not a de Polignac number, because 51365279 - 2¹² = 51361183 is a prime.

It is a super-4 number, since 4×51365279⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51365299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133922 + ... + 134304.

It is an arithmetic number, because the mean of its divisors is an integer number (2073600).

Almost surely, 2^51365279 is an apocalyptic number.

51365279 is a deficient number, since it is larger than the sum of its proper divisors (14989921).

51365279 is a wasteful number, since it uses less digits than its factorization.

51365279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 430 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 51365279 is about 7166.9574437135. The cubic root of 51365279 is about 371.7262385380.

The spelling of 51365279 in words is "fifty-one million, three hundred sixty-five thousand, two hundred seventy-nine".