51755513 has 4 divisors (see below), whose sum is σ = 51782400. Its totient is φ = 51728628.

The previous prime is 51755503. The next prime is 51755537. The reversal of 51755513 is 31555715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51755513 - 2⁸ = 51755257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51755513.

It is not an unprimeable number, because it can be changed into a prime (51755503) 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, 10313 + ... + 14486.

It is an arithmetic number, because the mean of its divisors is an integer number (12945600).

Almost surely, 2^51755513 is an apocalyptic number.

It is an amenable number.

51755513 is a deficient number, since it is larger than the sum of its proper divisors (26887).

51755513 is a wasteful number, since it uses less digits than its factorization.

51755513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26886.

The product of its digits is 13125, while the sum is 32.

The square root of 51755513 is about 7194.1304547527. The cubic root of 51755513 is about 372.6652282625.

The spelling of 51755513 in words is "fifty-one million, seven hundred fifty-five thousand, five hundred thirteen".