51759657 has 6 divisors (see below), whose sum is σ = 74763962. Its totient is φ = 34506432.

The previous prime is 51759649. The next prime is 51759661. The reversal of 51759657 is 75695715.

It is a happy number.

51759657 is a `hidden beast` number, since 5 + 1 + 7 + 596 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37197801 + 14561856 = 6099^2 + 3816^2 .

It is not a de Polignac number, because 51759657 - 2³ = 51759649 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (51759647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2875528 + ... + 2875545.

Almost surely, 2^51759657 is an apocalyptic number.

It is an amenable number.

51759657 is a deficient number, since it is larger than the sum of its proper divisors (23004305).

51759657 is a wasteful number, since it uses less digits than its factorization.

51759657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751079 (or 5751076 counting only the distinct ones).

The product of its digits is 330750, while the sum is 45.

The square root of 51759657 is about 7194.4184615575. The cubic root of 51759657 is about 372.6751742786.

It can be divided in two parts, 517596 and 57, that added together give a triangular number (517653 = T₁₀₁₇).

The spelling of 51759657 in words is "fifty-one million, seven hundred fifty-nine thousand, six hundred fifty-seven".