557326261 has 4 divisors (see below), whose sum is σ = 560663712. Its totient is φ = 553988812.

The previous prime is 557326223. The next prime is 557326267. The reversal of 557326261 is 162623755.

557326261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 557326261 - 2¹¹ = 557324213 is a prime.

It is a super-2 number, since 2×557326261² = 621225122400480242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 557326261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557326267) 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, 1668475 + ... + 1668808.

It is an arithmetic number, because the mean of its divisors is an integer number (140165928).

Almost surely, 2^557326261 is an apocalyptic number.

It is an amenable number.

557326261 is a deficient number, since it is larger than the sum of its proper divisors (3337451).

557326261 is a wasteful number, since it uses less digits than its factorization.

557326261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337450.

The product of its digits is 75600, while the sum is 37.

The square root of 557326261 is about 23607.7584916485. The cubic root of 557326261 is about 822.9431522058.

The spelling of 557326261 in words is "five hundred fifty-seven million, three hundred twenty-six thousand, two hundred sixty-one".