57277381 has 16 divisors (see below), whose sum is σ = 69468160. Its totient is φ = 46131120.

The previous prime is 57277379. The next prime is 57277393. The reversal of 57277381 is 18377275.

It is not a de Polignac number, because 57277381 - 2¹ = 57277379 is a prime.

It is a super-2 number, since 2×57277381² = 6561396748438322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57277331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15196 + ... + 18586.

It is an arithmetic number, because the mean of its divisors is an integer number (4341760).

Almost surely, 2^57277381 is an apocalyptic number.

It is an amenable number.

57277381 is a deficient number, since it is larger than the sum of its proper divisors (12190779).

57277381 is a wasteful number, since it uses less digits than its factorization.

57277381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544.

The product of its digits is 82320, while the sum is 40.

The square root of 57277381 is about 7568.1821463281. The cubic root of 57277381 is about 385.4733728664.

The spelling of 57277381 in words is "fifty-seven million, two hundred seventy-seven thousand, three hundred eighty-one".