22508461 has 4 divisors (see below), whose sum is σ = 22520124. Its totient is φ = 22496800.

The previous prime is 22508429. The next prime is 22508471. The reversal of 22508461 is 16480522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11519236 + 10989225 = 3394^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 22508461 - 2⁵ = 22508429 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 (22508471) 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, 2170 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (5630031).

Almost surely, 2^22508461 is an apocalyptic number.

It is an amenable number.

22508461 is a deficient number, since it is larger than the sum of its proper divisors (11663).

22508461 is an equidigital number, since it uses as much as digits as its factorization.

22508461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11662.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 22508461 is about 4744.3082741323. The cubic root of 22508461 is about 282.3461913666.

Adding to 22508461 its reverse (16480522), we get a palindrome (38988983).

The spelling of 22508461 in words is "twenty-two million, five hundred eight thousand, four hundred sixty-one".