22749641 has 4 divisors (see below), whose sum is σ = 22766484. Its totient is φ = 22732800.

The previous prime is 22749611. The next prime is 22749679. The reversal of 22749641 is 14694722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13719616 + 9030025 = 3704^2 + 3005^2 .

It is a cyclic number.

It is not a de Polignac number, because 22749641 - 2²² = 18555337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22749611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6200 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (5691621).

Almost surely, 2^22749641 is an apocalyptic number.

It is an amenable number.

22749641 is a deficient number, since it is larger than the sum of its proper divisors (16843).

22749641 is a wasteful number, since it uses less digits than its factorization.

22749641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16842.

The product of its digits is 24192, while the sum is 35.

The square root of 22749641 is about 4769.6583735106. The cubic root of 22749641 is about 283.3510649418.

The spelling of 22749641 in words is "twenty-two million, seven hundred forty-nine thousand, six hundred forty-one".