22151249 has 2 divisors, whose sum is σ = 22151250. Its totient is φ = 22151248.

The previous prime is 22151209. The next prime is 22151257. The reversal of 22151249 is 94215122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12909649 + 9241600 = 3593^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 22151249 - 2⁸ = 22150993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22151209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11075624 + 11075625.

It is an arithmetic number, because the mean of its divisors is an integer number (11075625).

Almost surely, 2^22151249 is an apocalyptic number.

It is an amenable number.

22151249 is a deficient number, since it is larger than the sum of its proper divisors (1).

22151249 is an equidigital number, since it uses as much as digits as its factorization.

22151249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 22151249 is about 4706.5113406854. The cubic root of 22151249 is about 280.8445968904.

The spelling of 22151249 in words is "twenty-two million, one hundred fifty-one thousand, two hundred forty-nine".