22254157 has 2 divisors, whose sum is σ = 22254158. Its totient is φ = 22254156.

The previous prime is 22254121. The next prime is 22254161. The reversal of 22254157 is 75145222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21659716 + 594441 = 4654^2 + 771^2 .

It is a cyclic number.

It is not a de Polignac number, because 22254157 - 2²³ = 13865549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22254257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11127078 + 11127079.

It is an arithmetic number, because the mean of its divisors is an integer number (11127079).

Almost surely, 2^22254157 is an apocalyptic number.

It is an amenable number.

22254157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22254157 is an equidigital number, since it uses as much as digits as its factorization.

22254157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 28.

The square root of 22254157 is about 4717.4311865675. The cubic root of 22254157 is about 281.2788314805.

Adding to 22254157 its reverse (75145222), we get a palindrome (97399379).

The spelling of 22254157 in words is "twenty-two million, two hundred fifty-four thousand, one hundred fifty-seven".