51779845 has 16 divisors (see below), whose sum is σ = 70439040. Its totient is φ = 36224064.

The previous prime is 51779821. The next prime is 51779879. The reversal of 51779845 is 54897715.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51779845 - 2⁵ = 51779813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51779795 and 51779804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19729 + ... + 22198.

It is an arithmetic number, because the mean of its divisors is an integer number (4402440).

Almost surely, 2^51779845 is an apocalyptic number.

It is an amenable number.

51779845 is a deficient number, since it is larger than the sum of its proper divisors (18659195).

51779845 is a wasteful number, since it uses less digits than its factorization.

51779845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41964.

The product of its digits is 352800, while the sum is 46.

The square root of 51779845 is about 7195.8213568709. The cubic root of 51779845 is about 372.7236199144.

The spelling of 51779845 in words is "fifty-one million, seven hundred seventy-nine thousand, eight hundred forty-five".