22520961 has 6 divisors (see below), whose sum is σ = 32530290. Its totient is φ = 15013968.

The previous prime is 22520959. The next prime is 22520963. The reversal of 22520961 is 16902522.

It is an interprime number because it is at equal distance from previous prime (22520959) and next prime (22520963).

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 53361 = 4740^2 + 231^2 .

It is not a de Polignac number, because 22520961 - 2¹ = 22520959 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22520963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1251156 + ... + 1251173.

It is an arithmetic number, because the mean of its divisors is an integer number (5421715).

Almost surely, 2^22520961 is an apocalyptic number.

It is an amenable number.

22520961 is a deficient number, since it is larger than the sum of its proper divisors (10009329).

22520961 is a wasteful number, since it uses less digits than its factorization.

22520961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502335 (or 2502332 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 22520961 is about 4745.6254593046. The cubic root of 22520961 is about 282.3984483713.

The spelling of 22520961 in words is "twenty-two million, five hundred twenty thousand, nine hundred sixty-one".