57681281 has 16 divisors (see below), whose sum is σ = 67670400. Its totient is φ = 49145040.

The previous prime is 57681269. The next prime is 57681287. The reversal of 57681281 is 18218675.

It is not a de Polignac number, because 57681281 - 2¹⁴ = 57664897 is a prime.

It is a super-2 number, since 2×57681281² = 6654260355601922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57681287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71975 + ... + 72771.

It is an arithmetic number, because the mean of its divisors is an integer number (4229400).

Almost surely, 2^57681281 is an apocalyptic number.

It is an amenable number.

57681281 is a deficient number, since it is larger than the sum of its proper divisors (9989119).

57681281 is an equidigital number, since it uses as much as digits as its factorization.

57681281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1015 counting only the distinct ones).

The product of its digits is 26880, while the sum is 38.

The square root of 57681281 is about 7594.8193526904. The cubic root of 57681281 is about 386.3773257366.

The spelling of 57681281 in words is "fifty-seven million, six hundred eighty-one thousand, two hundred eighty-one".