561572023 has 6 divisors (see below), whose sum is σ = 563557776. Its totient is φ = 559589112.

The previous prime is 561572017. The next prime is 561572057. The reversal of 561572023 is 320275165.

It is not a de Polignac number, because 561572023 - 2¹³ = 561563831 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 (561572003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 453361 + ... + 454597.

It is an arithmetic number, because the mean of its divisors is an integer number (93926296).

Almost surely, 2^561572023 is an apocalyptic number.

561572023 is a deficient number, since it is larger than the sum of its proper divisors (1985753).

561572023 is an frugal number, since it uses more digits than its factorization.

561572023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 561572023 is about 23697.5109030463. The cubic root of 561572023 is about 825.0276197671.

The spelling of 561572023 in words is "five hundred sixty-one million, five hundred seventy-two thousand, twenty-three".