22251238 has 4 divisors (see below), whose sum is σ = 33376860. Its totient is φ = 11125618.

The previous prime is 22251227. The next prime is 22251239. The reversal of 22251238 is 83215222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5562808 + ... + 5562811.

It is an arithmetic number, because the mean of its divisors is an integer number (8344215).

Almost surely, 2^22251238 is an apocalyptic number.

22251238 is a deficient number, since it is larger than the sum of its proper divisors (11125622).

22251238 is a wasteful number, since it uses less digits than its factorization.

22251238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11125621.

The product of its digits is 1920, while the sum is 25.

The square root of 22251238 is about 4717.1217919405. The cubic root of 22251238 is about 281.2665328224.

The spelling of 22251238 in words is "twenty-two million, two hundred fifty-one thousand, two hundred thirty-eight".