51777895 has 8 divisors (see below), whose sum is σ = 66913056. Its totient is φ = 38235936.

The previous prime is 51777893. The next prime is 51777919. The reversal of 51777895 is 59877715.

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

It is a cyclic number.

It is not a de Polignac number, because 51777895 - 2¹ = 51777893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51777893) 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, 398227 + ... + 398356.

It is an arithmetic number, because the mean of its divisors is an integer number (8364132).

Almost surely, 2^51777895 is an apocalyptic number.

51777895 is a deficient number, since it is larger than the sum of its proper divisors (15135161).

51777895 is a wasteful number, since it uses less digits than its factorization.

51777895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796601.

The product of its digits is 617400, while the sum is 49.

The square root of 51777895 is about 7195.6858602916. The cubic root of 51777895 is about 372.7189410014.

The spelling of 51777895 in words is "fifty-one million, seven hundred seventy-seven thousand, eight hundred ninety-five".