22520461 has 4 divisors (see below), whose sum is σ = 23845212. Its totient is φ = 21195712.

The previous prime is 22520447. The next prime is 22520479. The reversal of 22520461 is 16402522.

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 9517225 + 13003236 = 3085^2 + 3606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22520461 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 (22520401) 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 3 ways as a sum of consecutive naturals, for example, 662350 + ... + 662383.

It is an arithmetic number, because the mean of its divisors is an integer number (5961303).

Almost surely, 2^22520461 is an apocalyptic number.

It is an amenable number.

22520461 is a deficient number, since it is larger than the sum of its proper divisors (1324751).

22520461 is a wasteful number, since it uses less digits than its factorization.

22520461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324750.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 22520461 is about 4745.5727789172. The cubic root of 22520461 is about 282.3963584625.

Adding to 22520461 its reverse (16402522), we get a palindrome (38922983).

The spelling of 22520461 in words is "twenty-two million, five hundred twenty thousand, four hundred sixty-one".