22590661 has 4 divisors (see below), whose sum is σ = 23319424. Its totient is φ = 21861900.

The previous prime is 22590613. The next prime is 22590703. The reversal of 22590661 is 16609522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22590661 - 2¹¹ = 22588613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 728731 = 22590661 / (2 + 2 + 5 + 9 + 0 + 6 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22590611) 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, 364335 + ... + 364396.

It is an arithmetic number, because the mean of its divisors is an integer number (5829856).

Almost surely, 2^22590661 is an apocalyptic number.

It is an amenable number.

22590661 is a deficient number, since it is larger than the sum of its proper divisors (728763).

22590661 is an equidigital number, since it uses as much as digits as its factorization.

22590661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728762.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 22590661 is about 4752.9633914012. The cubic root of 22590661 is about 282.6894794825.

The spelling of 22590661 in words is "twenty-two million, five hundred ninety thousand, six hundred sixty-one".