22422551 has 4 divisors (see below), whose sum is σ = 22845672. Its totient is φ = 21999432.

The previous prime is 22422529. The next prime is 22422553. The reversal of 22422551 is 15522422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15522422 = 2 ⋅7761211.

It is a cyclic number.

It is not a de Polignac number, because 22422551 - 2⁶ = 22422487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22422553) 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, 211481 + ... + 211586.

It is an arithmetic number, because the mean of its divisors is an integer number (5711418).

Almost surely, 2^22422551 is an apocalyptic number.

22422551 is a deficient number, since it is larger than the sum of its proper divisors (423121).

22422551 is an equidigital number, since it uses as much as digits as its factorization.

22422551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423120.

The product of its digits is 1600, while the sum is 23.

The square root of 22422551 is about 4735.2456113701. The cubic root of 22422551 is about 281.9865149563.

Adding to 22422551 its reverse (15522422), we get a palindrome (37944973).

The spelling of 22422551 in words is "twenty-two million, four hundred twenty-two thousand, five hundred fifty-one".