561224087 has 4 divisors (see below), whose sum is σ = 561294240. Its totient is φ = 561153936.

The previous prime is 561224057. The next prime is 561224117. The reversal of 561224087 is 780422165.

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

It is an interprime number because it is at equal distance from previous prime (561224057) and next prime (561224117).

It is a cyclic number.

It is not a de Polignac number, because 561224087 - 2⁶ = 561224023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561224047) 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, 21263 + ... + 39680.

It is an arithmetic number, because the mean of its divisors is an integer number (140323560).

Almost surely, 2^561224087 is an apocalyptic number.

561224087 is a deficient number, since it is larger than the sum of its proper divisors (70153).

561224087 is an equidigital number, since it uses as much as digits as its factorization.

561224087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70152.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 561224087 is about 23690.1685726379. The cubic root of 561224087 is about 824.8571957295.

The spelling of 561224087 in words is "five hundred sixty-one million, two hundred twenty-four thousand, eighty-seven".