51777879 has 8 divisors (see below), whose sum is σ = 70506240. Its totient is φ = 33784056.

The previous prime is 51777877. The next prime is 51777883. The reversal of 51777879 is 97877715.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51777879 - 2¹ = 51777877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51777871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183469 + ... + 183750.

It is an arithmetic number, because the mean of its divisors is an integer number (8813280).

Almost surely, 2^51777879 is an apocalyptic number.

51777879 is a deficient number, since it is larger than the sum of its proper divisors (18728361).

51777879 is a wasteful number, since it uses less digits than its factorization.

51777879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367269.

The product of its digits is 864360, while the sum is 51.

The square root of 51777879 is about 7195.6847485142. The cubic root of 51777879 is about 372.7189026098.

The spelling of 51777879 in words is "fifty-one million, seven hundred seventy-seven thousand, eight hundred seventy-nine".