22500561 has 8 divisors (see below), whose sum is σ = 30031200. Its totient is φ = 14985152.

The previous prime is 22500559. The next prime is 22500563. The reversal of 22500561 is 16500522.

It is an interprime number because it is at equal distance from previous prime (22500559) and next prime (22500563).

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

It is a cyclic number.

It is not a de Polignac number, because 22500561 - 2¹ = 22500559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22500563) 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 7 ways as a sum of consecutive naturals, for example, 265 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (3753900).

Almost surely, 2^22500561 is an apocalyptic number.

It is an amenable number.

22500561 is a deficient number, since it is larger than the sum of its proper divisors (7530639).

22500561 is a wasteful number, since it uses less digits than its factorization.

22500561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 22500561 is about 4743.4756244762. The cubic root of 22500561 is about 282.3131549613.

The spelling of 22500561 in words is "twenty-two million, five hundred thousand, five hundred sixty-one".