22520999 has 2 divisors, whose sum is σ = 22521000. Its totient is φ = 22520998.

The previous prime is 22520989. The next prime is 22521041. The reversal of 22520999 is 99902522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22520999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22520929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260499 + 11260500.

It is an arithmetic number, because the mean of its divisors is an integer number (11260500).

Almost surely, 2^22520999 is an apocalyptic number.

22520999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22520999 is an equidigital number, since it uses as much as digits as its factorization.

22520999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 22520999 is about 4745.6294629901. The cubic root of 22520999 is about 282.3986072032.

The spelling of 22520999 in words is "twenty-two million, five hundred twenty thousand, nine hundred ninety-nine".