51777563 has 4 divisors (see below), whose sum is σ = 54823320. Its totient is φ = 48731808.

The previous prime is 51777553. The next prime is 51777569. The reversal of 51777563 is 36577715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36577715 = 5 ⋅7315543.

It is a cyclic number.

It is not a de Polignac number, because 51777563 - 2⁸ = 51777307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51777563.

It is not an unprimeable number, because it can be changed into a prime (51777569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522853 + ... + 1522886.

It is an arithmetic number, because the mean of its divisors is an integer number (13705830).

Almost surely, 2^51777563 is an apocalyptic number.

51777563 is a deficient number, since it is larger than the sum of its proper divisors (3045757).

51777563 is a wasteful number, since it uses less digits than its factorization.

51777563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045756.

The product of its digits is 154350, while the sum is 41.

The square root of 51777563 is about 7195.6627908762. The cubic root of 51777563 is about 372.7181443747.

The spelling of 51777563 in words is "fifty-one million, seven hundred seventy-seven thousand, five hundred sixty-three".