57152281 has 2 divisors, whose sum is σ = 57152282. Its totient is φ = 57152280.

The previous prime is 57152233. The next prime is 57152299. The reversal of 57152281 is 18225175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41024025 + 16128256 = 6405^2 + 4016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57152281 is a prime.

It is a super-2 number, since 2×57152281² = 6532766447005922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57152681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28576140 + 28576141.

It is an arithmetic number, because the mean of its divisors is an integer number (28576141).

Almost surely, 2^57152281 is an apocalyptic number.

It is an amenable number.

57152281 is a deficient number, since it is larger than the sum of its proper divisors (1).

57152281 is an equidigital number, since it uses as much as digits as its factorization.

57152281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 31.

The square root of 57152281 is about 7559.9127640470. The cubic root of 57152281 is about 385.1925297794.

The spelling of 57152281 in words is "fifty-seven million, one hundred fifty-two thousand, two hundred eighty-one".