22551443 has 4 divisors (see below), whose sum is σ = 22804920. Its totient is φ = 22297968.

The previous prime is 22551439. The next prime is 22551449. The reversal of 22551443 is 34415522.

It is a happy number.

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 22551443 - 2² = 22551439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22551449) 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, 126605 + ... + 126782.

It is an arithmetic number, because the mean of its divisors is an integer number (5701230).

Almost surely, 2^22551443 is an apocalyptic number.

22551443 is a deficient number, since it is larger than the sum of its proper divisors (253477).

22551443 is an equidigital number, since it uses as much as digits as its factorization.

22551443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253476.

The product of its digits is 4800, while the sum is 26.

The square root of 22551443 is about 4748.8359626334. The cubic root of 22551443 is about 282.5257991945.

Adding to 22551443 its reverse (34415522), we get a palindrome (56966965).

The spelling of 22551443 in words is "twenty-two million, five hundred fifty-one thousand, four hundred forty-three".