57236513 has 2 divisors, whose sum is σ = 57236514. Its totient is φ = 57236512.

The previous prime is 57236497. The next prime is 57236563. The reversal of 57236513 is 31563275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42667024 + 14569489 = 6532^2 + 3817^2 .

It is a cyclic number.

It is not a de Polignac number, because 57236513 - 2⁴ = 57236497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57236513.

It is not a weakly prime, because it can be changed into another prime (57236563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28618256 + 28618257.

It is an arithmetic number, because the mean of its divisors is an integer number (28618257).

Almost surely, 2^57236513 is an apocalyptic number.

It is an amenable number.

57236513 is a deficient number, since it is larger than the sum of its proper divisors (1).

57236513 is an equidigital number, since it uses as much as digits as its factorization.

57236513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 32.

The square root of 57236513 is about 7565.4816766680. The cubic root of 57236513 is about 385.3816713152.

Adding to 57236513 its reverse (31563275), we get a palindrome (88799788).

The spelling of 57236513 in words is "fifty-seven million, two hundred thirty-six thousand, five hundred thirteen".