57615881 has 2 divisors, whose sum is σ = 57615882. Its totient is φ = 57615880.

The previous prime is 57615863. The next prime is 57615911. The reversal of 57615881 is 18851675.

57615881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32775625 + 24840256 = 5725^2 + 4984^2 .

It is a cyclic number.

It is not a de Polignac number, because 57615881 - 2¹⁴ = 57599497 is a prime.

It is a super-2 number, since 2×57615881² = 6639179486812322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57615821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28807940 + 28807941.

It is an arithmetic number, because the mean of its divisors is an integer number (28807941).

Almost surely, 2^57615881 is an apocalyptic number.

It is an amenable number.

57615881 is a deficient number, since it is larger than the sum of its proper divisors (1).

57615881 is an equidigital number, since it uses as much as digits as its factorization.

57615881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 41.

The square root of 57615881 is about 7590.5125650380. The cubic root of 57615881 is about 386.2312434903.

The spelling of 57615881 in words is "fifty-seven million, six hundred fifteen thousand, eight hundred eighty-one".