22527251 has 2 divisors, whose sum is σ = 22527252. Its totient is φ = 22527250.

The previous prime is 22527247. The next prime is 22527257. The reversal of 22527251 is 15272522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22527251 - 2² = 22527247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22527251.

It is not a weakly prime, because it can be changed into another prime (22527257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11263625 + 11263626.

It is an arithmetic number, because the mean of its divisors is an integer number (11263626).

Almost surely, 2^22527251 is an apocalyptic number.

22527251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22527251 is an equidigital number, since it uses as much as digits as its factorization.

22527251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 26.

The square root of 22527251 is about 4746.2881286327. The cubic root of 22527251 is about 282.4247367832.

Adding to 22527251 its reverse (15272522), we get a palindrome (37799773).

The spelling of 22527251 in words is "twenty-two million, five hundred twenty-seven thousand, two hundred fifty-one".