561594621 has 32 divisors (see below), whose sum is σ = 891021568. Its totient is φ = 307929600.

The previous prime is 561594619. The next prime is 561594623. The reversal of 561594621 is 126495165.

561594621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (561594619) and next prime (561594623).

It is not a de Polignac number, because 561594621 - 2¹ = 561594619 is a prime.

It is a super-2 number, since 2×561594621² = 630777036672267282, 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 561594621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561594623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51771 + ... + 61671.

It is an arithmetic number, because the mean of its divisors is an integer number (27844424).

Almost surely, 2^561594621 is an apocalyptic number.

It is an amenable number.

561594621 is a deficient number, since it is larger than the sum of its proper divisors (329426947).

561594621 is a wasteful number, since it uses less digits than its factorization.

561594621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021.

The product of its digits is 64800, while the sum is 39.

The square root of 561594621 is about 23697.9876993807. The cubic root of 561594621 is about 825.0386861565.

The spelling of 561594621 in words is "five hundred sixty-one million, five hundred ninety-four thousand, six hundred twenty-one".