57272681 has 2 divisors, whose sum is σ = 57272682. Its totient is φ = 57272680.

The previous prime is 57272659. The next prime is 57272693. The reversal of 57272681 is 18627275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 4579600 = 7259^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 57272681 - 2⁶ = 57272617 is a prime.

It is a super-2 number, since 2×57272681² = 6560319977855522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57272641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28636340 + 28636341.

It is an arithmetic number, because the mean of its divisors is an integer number (28636341).

Almost surely, 2^57272681 is an apocalyptic number.

It is an amenable number.

57272681 is a deficient number, since it is larger than the sum of its proper divisors (1).

57272681 is an equidigital number, since it uses as much as digits as its factorization.

57272681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 57272681 is about 7567.8716294610. The cubic root of 57272681 is about 385.4628290044.

The spelling of 57272681 in words is "fifty-seven million, two hundred seventy-two thousand, six hundred eighty-one".