57081413 has 2 divisors, whose sum is σ = 57081414. Its totient is φ = 57081412.

The previous prime is 57081403. The next prime is 57081419. The reversal of 57081413 is 31418075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37429924 + 19651489 = 6118^2 + 4433^2 .

It is a cyclic number.

It is not a de Polignac number, because 57081413 - 2²⁴ = 40304197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57081419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28540706 + 28540707.

It is an arithmetic number, because the mean of its divisors is an integer number (28540707).

Almost surely, 2^57081413 is an apocalyptic number.

It is an amenable number.

57081413 is a deficient number, since it is larger than the sum of its proper divisors (1).

57081413 is an equidigital number, since it uses as much as digits as its factorization.

57081413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 57081413 is about 7555.2242190421. The cubic root of 57081413 is about 385.0332528764.

Adding to 57081413 its reverse (31418075), we get a palindrome (88499488).

The spelling of 57081413 in words is "fifty-seven million, eighty-one thousand, four hundred thirteen".