22563551 has 2 divisors, whose sum is σ = 22563552. Its totient is φ = 22563550.

The previous prime is 22563533. The next prime is 22563553. The reversal of 22563551 is 15536522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22563551 - 2¹⁸ = 22301407 is a prime.

It is a super-2 number, since 2×22563551² = 1018227667459202, which contains 22 as substring.

Together with 22563553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22563553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11281775 + 11281776.

It is an arithmetic number, because the mean of its divisors is an integer number (11281776).

Almost surely, 2^22563551 is an apocalyptic number.

22563551 is a deficient number, since it is larger than the sum of its proper divisors (1).

22563551 is an equidigital number, since it uses as much as digits as its factorization.

22563551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 29.

The square root of 22563551 is about 4750.1106302906. The cubic root of 22563551 is about 282.5763533924.

The spelling of 22563551 in words is "twenty-two million, five hundred sixty-three thousand, five hundred fifty-one".