22641551 has 2 divisors, whose sum is σ = 22641552. Its totient is φ = 22641550.

The previous prime is 22641527. The next prime is 22641581. The reversal of 22641551 is 15514622.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22641551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22641551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22641581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11320775 + 11320776.

It is an arithmetic number, because the mean of its divisors is an integer number (11320776).

Almost surely, 2^22641551 is an apocalyptic number.

22641551 is a deficient number, since it is larger than the sum of its proper divisors (1).

22641551 is an equidigital number, since it uses as much as digits as its factorization.

22641551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 22641551 is about 4758.3138820385. The cubic root of 22641551 is about 282.9015918920.

The spelling of 22641551 in words is "twenty-two million, six hundred forty-one thousand, five hundred fifty-one".