57648281 has 4 divisors (see below), whose sum is σ = 60154752. Its totient is φ = 55141812.

The previous prime is 57648277. The next prime is 57648287. The reversal of 57648281 is 18284675.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57648281 - 2² = 57648277 is a prime.

It is a super-2 number, since 2×57648281² = 6646648604509922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57648287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253201 + ... + 1253246.

It is an arithmetic number, because the mean of its divisors is an integer number (15038688).

Almost surely, 2^57648281 is an apocalyptic number.

It is an amenable number.

57648281 is a deficient number, since it is larger than the sum of its proper divisors (2506471).

57648281 is a wasteful number, since it uses less digits than its factorization.

57648281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506470.

The product of its digits is 107520, while the sum is 41.

The square root of 57648281 is about 7592.6465083000. The cubic root of 57648281 is about 386.3036283207.

The spelling of 57648281 in words is "fifty-seven million, six hundred forty-eight thousand, two hundred eighty-one".