22257749 has 2 divisors, whose sum is σ = 22257750. Its totient is φ = 22257748.

The previous prime is 22257737. The next prime is 22257779. The reversal of 22257749 is 94775222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 2739025 = 4418^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 22257749 - 2¹² = 22253653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22257779) 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, 11128874 + 11128875.

It is an arithmetic number, because the mean of its divisors is an integer number (11128875).

Almost surely, 2^22257749 is an apocalyptic number.

It is an amenable number.

22257749 is a deficient number, since it is larger than the sum of its proper divisors (1).

22257749 is an equidigital number, since it uses as much as digits as its factorization.

22257749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 38.

The square root of 22257749 is about 4717.8118868815. The cubic root of 22257749 is about 281.2939642219.

The spelling of 22257749 in words is "twenty-two million, two hundred fifty-seven thousand, seven hundred forty-nine".