52400057 has 6 divisors (see below), whose sum is σ = 53133102. Its totient is φ = 51676992.

The previous prime is 52400041. The next prime is 52400087. The reversal of 52400057 is 75000425.

It can be written as a sum of positive squares in 3 ways, for example, as 10784656 + 41615401 = 3284^2 + 6451^2 .

It is not a de Polignac number, because 52400057 - 2⁴ = 52400041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52400017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413 + ... + 10245.

It is an arithmetic number, because the mean of its divisors is an integer number (8855517).

Almost surely, 2^52400057 is an apocalyptic number.

It is an amenable number.

52400057 is a deficient number, since it is larger than the sum of its proper divisors (733045).

52400057 is an frugal number, since it uses more digits than its factorization.

52400057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9979 (or 9906 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 52400057 is about 7238.7883654656. The cubic root of 52400057 is about 374.2058619584.

The spelling of 52400057 in words is "fifty-two million, four hundred thousand, fifty-seven".