557381 has 4 divisors (see below), whose sum is σ = 608064. Its totient is φ = 506700.

The previous prime is 557377. The next prime is 557423. The reversal of 557381 is 183755.

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 557381 - 2² = 557377 is a prime.

It is a super-2 number, since 2×557381² = 621347158322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 557381.

It is not an unprimeable number, because it can be changed into a prime (557321) 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, 25325 + ... + 25346.

It is an arithmetic number, because the mean of its divisors is an integer number (152016).

2⁵⁵⁷³⁸¹ is an apocalyptic number.

It is an amenable number.

557381 is a deficient number, since it is larger than the sum of its proper divisors (50683).

557381 is a wasteful number, since it uses less digits than its factorization.

557381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50682.

The product of its digits is 4200, while the sum is 29.

The square root of 557381 is about 746.5795336064. The cubic root of 557381 is about 82.2970093702.

The spelling of 557381 in words is "five hundred fifty-seven thousand, three hundred eighty-one".