57433381 has 2 divisors, whose sum is σ = 57433382. Its totient is φ = 57433380.

The previous prime is 57433379. The next prime is 57433399. The reversal of 57433381 is 18333475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32092225 + 25341156 = 5665^2 + 5034^2 .

It is a cyclic number.

It is not a de Polignac number, because 57433381 - 2¹ = 57433379 is a prime.

It is a super-2 number, since 2×57433381² = 6597186506182322, which contains 22 as substring.

Together with 57433379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57433331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28716690 + 28716691.

It is an arithmetic number, because the mean of its divisors is an integer number (28716691).

Almost surely, 2^57433381 is an apocalyptic number.

It is an amenable number.

57433381 is a deficient number, since it is larger than the sum of its proper divisors (1).

57433381 is an equidigital number, since it uses as much as digits as its factorization.

57433381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 57433381 is about 7578.4814441945. The cubic root of 57433381 is about 385.8230125455.

The spelling of 57433381 in words is "fifty-seven million, four hundred thirty-three thousand, three hundred eighty-one".