22422157 has 2 divisors, whose sum is σ = 22422158. Its totient is φ = 22422156.

The previous prime is 22422143. The next prime is 22422187. The reversal of 22422157 is 75122422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 4605316 = 4221^2 + 2146^2 .

It is a cyclic number.

It is not a de Polignac number, because 22422157 - 2²³ = 14033549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22422187) 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 as a sum of consecutive naturals, namely, 11211078 + 11211079.

It is an arithmetic number, because the mean of its divisors is an integer number (11211079).

Almost surely, 2^22422157 is an apocalyptic number.

It is an amenable number.

22422157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22422157 is an equidigital number, since it uses as much as digits as its factorization.

22422157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 25.

The square root of 22422157 is about 4735.2040082767. The cubic root of 22422157 is about 281.9848632956.

Adding to 22422157 its reverse (75122422), we get a palindrome (97544579).

The spelling of 22422157 in words is "twenty-two million, four hundred twenty-two thousand, one hundred fifty-seven".