57356381 has 2 divisors, whose sum is σ = 57356382. Its totient is φ = 57356380.

The previous prime is 57356363. The next prime is 57356393. The reversal of 57356381 is 18365375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41396356 + 15960025 = 6434^2 + 3995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57356381 is a prime.

It is a super-2 number, since 2×57356381² = 6579508882834322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57358381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28678190 + 28678191.

It is an arithmetic number, because the mean of its divisors is an integer number (28678191).

Almost surely, 2^57356381 is an apocalyptic number.

It is an amenable number.

57356381 is a deficient number, since it is larger than the sum of its proper divisors (1).

57356381 is an equidigital number, since it uses as much as digits as its factorization.

57356381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 57356381 is about 7573.3995669052. The cubic root of 57356381 is about 385.6505132205.

The spelling of 57356381 in words is "fifty-seven million, three hundred fifty-six thousand, three hundred eighty-one".