57381345 has 64 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 25574400.

The previous prime is 57381329. The next prime is 57381353. The reversal of 57381345 is 54318375.

57381345 is a `hidden beast` number, since 573 + 81 + 3 + 4 + 5 = 666.

It is not a de Polignac number, because 57381345 - 2⁴ = 57381329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38005 + ... + 39485.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^57381345 is an apocalyptic number.

It is an amenable number.

57381345 is an abundant number, since it is smaller than the sum of its proper divisors (62127135).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57381345 is a wasteful number, since it uses less digits than its factorization.

57381345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543 (or 1537 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 57381345 is about 7575.0475246034. The cubic root of 57381345 is about 385.7064557493.

It can be divided in two parts, 573 and 81345, that added together give a palindrome (81918).

The spelling of 57381345 in words is "fifty-seven million, three hundred eighty-one thousand, three hundred forty-five".