22912561 has 8 divisors (see below), whose sum is σ = 26221824. Its totient is φ = 19612320.

The previous prime is 22912553. The next prime is 22912573. The reversal of 22912561 is 16521922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22912561 - 2³ = 22912553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22912511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4581 + ... + 8173.

It is an arithmetic number, because the mean of its divisors is an integer number (3277728).

Almost surely, 2^22912561 is an apocalyptic number.

It is an amenable number.

22912561 is a deficient number, since it is larger than the sum of its proper divisors (3309263).

22912561 is an equidigital number, since it uses as much as digits as its factorization.

22912561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511.

The product of its digits is 2160, while the sum is 28.

The square root of 22912561 is about 4786.7066966757. The cubic root of 22912561 is about 284.0258564371.

The spelling of 22912561 in words is "twenty-two million, nine hundred twelve thousand, five hundred sixty-one".