557291 has 4 divisors (see below), whose sum is σ = 636912. Its totient is φ = 477672.

The previous prime is 557281. The next prime is 557303. The reversal of 557291 is 192755.

557291 = T₄₂₈ + T₄₂₉ + ... + T₄₃₃.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 557291 - 2¹⁰ = 556267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557201) 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, 39800 + ... + 39813.

It is an arithmetic number, because the mean of its divisors is an integer number (159228).

2⁵⁵⁷²⁹¹ is an apocalyptic number.

557291 is a deficient number, since it is larger than the sum of its proper divisors (79621).

557291 is an equidigital number, since it uses as much as digits as its factorization.

557291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79620.

The product of its digits is 3150, while the sum is 29.

The square root of 557291 is about 746.5192562821. The cubic root of 557291 is about 82.2925796477.

It can be divided in two parts, 557 and 291, that added together give a palindrome (848).

The spelling of 557291 in words is "five hundred fifty-seven thousand, two hundred ninety-one".