57535981 has 2 divisors, whose sum is σ = 57535982. Its totient is φ = 57535980.

The previous prime is 57535967. The next prime is 57536053. The reversal of 57535981 is 18953575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48080356 + 9455625 = 6934^2 + 3075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57535981 is a prime.

It is a super-2 number, since 2×57535981² = 6620778219264722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57535901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28767990 + 28767991.

It is an arithmetic number, because the mean of its divisors is an integer number (28767991).

Almost surely, 2^57535981 is an apocalyptic number.

It is an amenable number.

57535981 is a deficient number, since it is larger than the sum of its proper divisors (1).

57535981 is an equidigital number, since it uses as much as digits as its factorization.

57535981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 43.

The square root of 57535981 is about 7585.2475898945. The cubic root of 57535981 is about 386.0526228739.

The spelling of 57535981 in words is "fifty-seven million, five hundred thirty-five thousand, nine hundred eighty-one".