51750513 has 6 divisors (see below), whose sum is σ = 74750754. Its totient is φ = 34500336.

The previous prime is 51750469. The next prime is 51750581. The reversal of 51750513 is 31505715.

51750513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44395569 + 7354944 = 6663^2 + 2712^2 .

It is not a de Polignac number, because 51750513 - 2⁶ = 51750449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51750593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2875020 + ... + 2875037.

It is an arithmetic number, because the mean of its divisors is an integer number (12458459).

Almost surely, 2^51750513 is an apocalyptic number.

It is an amenable number.

51750513 is a deficient number, since it is larger than the sum of its proper divisors (23000241).

51750513 is a wasteful number, since it uses less digits than its factorization.

51750513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5750063 (or 5750060 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 27.

The square root of 51750513 is about 7193.7829408455. The cubic root of 51750513 is about 372.6532270538.

The spelling of 51750513 in words is "fifty-one million, seven hundred fifty thousand, five hundred thirteen".