557191 has 4 divisors (see below), whose sum is σ = 560272. Its totient is φ = 554112.

The previous prime is 557159. The next prime is 557197. The reversal of 557191 is 191755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191755 = 5 ⋅38351.

It is a cyclic number.

It is not a de Polignac number, because 557191 - 2⁵ = 557159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557197) 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, 1251 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (140068).

2⁵⁵⁷¹⁹¹ is an apocalyptic number.

557191 is a deficient number, since it is larger than the sum of its proper divisors (3081).

557191 is a wasteful number, since it uses less digits than its factorization.

557191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080.

The product of its digits is 1575, while the sum is 28.

The square root of 557191 is about 746.4522757685. The cubic root of 557191 is about 82.2876571744.

The spelling of 557191 in words is "five hundred fifty-seven thousand, one hundred ninety-one".