57120381 has 12 divisors (see below), whose sum is σ = 83739552. Its totient is φ = 37511496.

The previous prime is 57120377. The next prime is 57120419. The reversal of 57120381 is 18302175.

It is not a de Polignac number, because 57120381 - 2² = 57120377 is a prime.

It is a super-2 number, since 2×57120381² = 6525475851170322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57120311) 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 11 ways as a sum of consecutive naturals, for example, 46761 + ... + 47966.

It is an arithmetic number, because the mean of its divisors is an integer number (6978296).

Almost surely, 2^57120381 is an apocalyptic number.

It is an amenable number.

57120381 is a deficient number, since it is larger than the sum of its proper divisors (26619171).

57120381 is a wasteful number, since it uses less digits than its factorization.

57120381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94800 (or 94797 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 57120381 is about 7557.8026568573. The cubic root of 57120381 is about 385.1208503507.

The spelling of 57120381 in words is "fifty-seven million, one hundred twenty thousand, three hundred eighty-one".