52515657 has 12 divisors (see below), whose sum is σ = 76608324. Its totient is φ = 34663200.

The previous prime is 52515649. The next prime is 52515667. The reversal of 52515657 is 75651525.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24890121 + 27625536 = 4989^2 + 5256^2 .

It is not a de Polignac number, because 52515657 - 2³ = 52515649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52515667) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 27978 + ... + 29795.

It is an arithmetic number, because the mean of its divisors is an integer number (6384027).

Almost surely, 2^52515657 is an apocalyptic number.

It is an amenable number.

52515657 is a deficient number, since it is larger than the sum of its proper divisors (24092667).

52515657 is a wasteful number, since it uses less digits than its factorization.

52515657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57880 (or 57877 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 52515657 is about 7246.7687281988. The cubic root of 52515657 is about 374.4808389231.

The spelling of 52515657 in words is "fifty-two million, five hundred fifteen thousand, six hundred fifty-seven".