22252551 has 4 divisors (see below), whose sum is σ = 29670072. Its totient is φ = 14835032.

The previous prime is 22252547. The next prime is 22252561. The reversal of 22252551 is 15525222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22252551 - 2² = 22252547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22252511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3708756 + ... + 3708761.

It is an arithmetic number, because the mean of its divisors is an integer number (7417518).

Almost surely, 2^22252551 is an apocalyptic number.

22252551 is a deficient number, since it is larger than the sum of its proper divisors (7417521).

22252551 is an equidigital number, since it uses as much as digits as its factorization.

22252551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7417520.

The product of its digits is 2000, while the sum is 24.

The square root of 22252551 is about 4717.2609637373. The cubic root of 22252551 is about 281.2720650343.

Adding to 22252551 its reverse (15525222), we get a palindrome (37777773).

The spelling of 22252551 in words is "twenty-two million, two hundred fifty-two thousand, five hundred fifty-one".