22649543 has 4 divisors (see below), whose sum is σ = 25885200. Its totient is φ = 19413888.

The previous prime is 22649509. The next prime is 22649563. The reversal of 22649543 is 34594622.

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

It is a cyclic number.

It is not a de Polignac number, because 22649543 - 2⁶ = 22649479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22649563) 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, 1617818 + ... + 1617831.

It is an arithmetic number, because the mean of its divisors is an integer number (6471300).

Almost surely, 2^22649543 is an apocalyptic number.

22649543 is a deficient number, since it is larger than the sum of its proper divisors (3235657).

22649543 is an equidigital number, since it uses as much as digits as its factorization.

22649543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235656.

The product of its digits is 51840, while the sum is 35.

The square root of 22649543 is about 4759.1536012194. The cubic root of 22649543 is about 282.9348741165.

The spelling of 22649543 in words is "twenty-two million, six hundred forty-nine thousand, five hundred forty-three".