22251128 has 16 divisors (see below), whose sum is σ = 43917000. Its totient is φ = 10539936.

The previous prime is 22251127. The next prime is 22251137. The reversal of 22251128 is 82115222.

It is a super-2 number, since 2×22251128² = 990225394544768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251127) 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, 73043 + ... + 73346.

Almost surely, 2^22251128 is an apocalyptic number.

It is an amenable number.

22251128 is a deficient number, since it is larger than the sum of its proper divisors (21665872).

22251128 is a wasteful number, since it uses less digits than its factorization.

22251128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146414 (or 146410 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 22251128 is about 4717.1101322738. The cubic root of 22251128 is about 281.2660693370.

The spelling of 22251128 in words is "twenty-two million, two hundred fifty-one thousand, one hundred twenty-eight".