22551238 has 4 divisors (see below), whose sum is σ = 33826860. Its totient is φ = 11275618.

The previous prime is 22551227. The next prime is 22551251. The reversal of 22551238 is 83215522.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5637808 + ... + 5637811.

It is an arithmetic number, because the mean of its divisors is an integer number (8456715).

Almost surely, 2^22551238 is an apocalyptic number.

22551238 is a deficient number, since it is larger than the sum of its proper divisors (11275622).

22551238 is a wasteful number, since it uses less digits than its factorization.

22551238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11275621.

The product of its digits is 4800, while the sum is 28.

The square root of 22551238 is about 4748.8143783475. The cubic root of 22551238 is about 282.5249431079.

The spelling of 22551238 in words is "twenty-two million, five hundred fifty-one thousand, two hundred thirty-eight".