51512755 has 32 divisors (see below), whose sum is σ = 74649600. Its totient is φ = 33361152.

The previous prime is 51512719. The next prime is 51512779. The reversal of 51512755 is 55721515.

It is a cyclic number.

It is not a de Polignac number, because 51512755 - 2⁷ = 51512627 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71286 + ... + 72004.

It is an arithmetic number, because the mean of its divisors is an integer number (2332800).

Almost surely, 2^51512755 is an apocalyptic number.

51512755 is a deficient number, since it is larger than the sum of its proper divisors (23136845).

51512755 is a wasteful number, since it uses less digits than its factorization.

51512755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843.

The product of its digits is 8750, while the sum is 31.

The square root of 51512755 is about 7177.2386751452. The cubic root of 51512755 is about 372.0816557751.

The spelling of 51512755 in words is "fifty-one million, five hundred twelve thousand, seven hundred fifty-five".