22744257 has 8 divisors (see below), whose sum is σ = 30369984. Its totient is φ = 15140688.

The previous prime is 22744247. The next prime is 22744313. The reversal of 22744257 is 75244722.

It is a happy number.

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

It is not a de Polignac number, because 22744257 - 2⁷ = 22744129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22744247) 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 in 7 ways as a sum of consecutive naturals, for example, 2973 + ... + 7370.

It is an arithmetic number, because the mean of its divisors is an integer number (3796248).

Almost surely, 2^22744257 is an apocalyptic number.

It is an amenable number.

22744257 is a deficient number, since it is larger than the sum of its proper divisors (7625727).

22744257 is a wasteful number, since it uses less digits than its factorization.

22744257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11079.

The product of its digits is 31360, while the sum is 33.

The square root of 22744257 is about 4769.0939391042. The cubic root of 22744257 is about 283.3287102667.

Adding to 22744257 its reverse (75244722), we get a palindrome (97988979).

The spelling of 22744257 in words is "twenty-two million, seven hundred forty-four thousand, two hundred fifty-seven".