22530661 has 4 divisors (see below), whose sum is σ = 23856012. Its totient is φ = 21205312.

The previous prime is 22530653. The next prime is 22530691. The reversal of 22530661 is 16603522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14516100 + 8014561 = 3810^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 22530661 - 2³ = 22530653 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 (22530601) 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, 662650 + ... + 662683.

It is an arithmetic number, because the mean of its divisors is an integer number (5964003).

Almost surely, 2^22530661 is an apocalyptic number.

It is an amenable number.

22530661 is a deficient number, since it is larger than the sum of its proper divisors (1325351).

22530661 is a wasteful number, since it uses less digits than its factorization.

22530661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325350.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 22530661 is about 4746.6473431255. The cubic root of 22530661 is about 282.4389864841.

The spelling of 22530661 in words is "twenty-two million, five hundred thirty thousand, six hundred sixty-one".