22649591 has 2 divisors, whose sum is σ = 22649592. Its totient is φ = 22649590.

The previous prime is 22649581. The next prime is 22649617. The reversal of 22649591 is 19594622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22649591 - 2¹⁴ = 22633207 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 (22649581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11324795 + 11324796.

It is an arithmetic number, because the mean of its divisors is an integer number (11324796).

Almost surely, 2^22649591 is an apocalyptic number.

22649591 is a deficient number, since it is larger than the sum of its proper divisors (1).

22649591 is an equidigital number, since it uses as much as digits as its factorization.

22649591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 22649591 is about 4759.1586441303. The cubic root of 22649591 is about 282.9350739861.

The spelling of 22649591 in words is "twenty-two million, six hundred forty-nine thousand, five hundred ninety-one".