22257649 has 8 divisors (see below), whose sum is σ = 22803840. Its totient is φ = 21714576.

The previous prime is 22257643. The next prime is 22257671. The reversal of 22257649 is 94675222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22257649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22257643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20287 + ... + 21355.

It is an arithmetic number, because the mean of its divisors is an integer number (2850480).

Almost surely, 2^22257649 is an apocalyptic number.

It is an amenable number.

22257649 is a deficient number, since it is larger than the sum of its proper divisors (546191).

22257649 is a wasteful number, since it uses less digits than its factorization.

22257649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559.

The product of its digits is 60480, while the sum is 37.

The square root of 22257649 is about 4717.8012887361. The cubic root of 22257649 is about 281.2935429538.

The spelling of 22257649 in words is "twenty-two million, two hundred fifty-seven thousand, six hundred forty-nine".