51801279 has 16 divisors (see below), whose sum is σ = 73758720. Its totient is φ = 32266080.

The previous prime is 51801247. The next prime is 51801307. The reversal of 51801279 is 97210815.

It is not a de Polignac number, because 51801279 - 2⁵ = 51801247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51801179) 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, 6907 + ... + 12300.

It is an arithmetic number, because the mean of its divisors is an integer number (4609920).

Almost surely, 2^51801279 is an apocalyptic number.

51801279 is a deficient number, since it is larger than the sum of its proper divisors (21957441).

51801279 is a wasteful number, since it uses less digits than its factorization.

51801279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19270.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 51801279 is about 7197.3105393612. The cubic root of 51801279 is about 372.7750418271.

The spelling of 51801279 in words is "fifty-one million, eight hundred one thousand, two hundred seventy-nine".