561064231 has 32 divisors (see below), whose sum is σ = 731501568. Its totient is φ = 418176000.

The previous prime is 561064193. The next prime is 561064249. The reversal of 561064231 is 132460165.

It is a cyclic number.

It is not a de Polignac number, because 561064231 - 2⁹ = 561063719 is a prime.

It is a super-2 number, since 2×561064231² = 629586142615242722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561064231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561064261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138231 + ... + 142231.

It is an arithmetic number, because the mean of its divisors is an integer number (22859424).

Almost surely, 2^561064231 is an apocalyptic number.

561064231 is a deficient number, since it is larger than the sum of its proper divisors (170437337).

561064231 is a wasteful number, since it uses less digits than its factorization.

561064231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 561064231 is about 23686.7944433180. The cubic root of 561064231 is about 824.7788723549.

The spelling of 561064231 in words is "five hundred sixty-one million, sixty-four thousand, two hundred thirty-one".