561591275 has 24 divisors (see below), whose sum is σ = 801615360. Its totient is φ = 382304160.

The previous prime is 561591271. The next prime is 561591307. The reversal of 561591275 is 572195165.

It is not a de Polignac number, because 561591275 - 2² = 561591271 is a prime.

It is a super-2 number, since 2×561591275² = 630769520312251250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561591271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12782 + ... + 35868.

It is an arithmetic number, because the mean of its divisors is an integer number (33400640).

Almost surely, 2^561591275 is an apocalyptic number.

561591275 is a deficient number, since it is larger than the sum of its proper divisors (240024085).

561591275 is a wasteful number, since it uses less digits than its factorization.

561591275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23243 (or 23238 counting only the distinct ones).

The product of its digits is 94500, while the sum is 41.

The square root of 561591275 is about 23697.9171025641. The cubic root of 561591275 is about 825.0370476170.

The spelling of 561591275 in words is "five hundred sixty-one million, five hundred ninety-one thousand, two hundred seventy-five".