22551828 has 24 divisors (see below), whose sum is σ = 56669088. Its totient is φ = 6938976.

The previous prime is 22551827. The next prime is 22551829. The reversal of 22551828 is 82815522.

It is an interprime number because it is at equal distance from previous prime (22551827) and next prime (22551829).

It is a super-2 number, since 2×22551828² = 1017169892283168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22551827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72126 + ... + 72437.

It is an arithmetic number, because the mean of its divisors is an integer number (2361212).

Almost surely, 2^22551828 is an apocalyptic number.

It is an amenable number.

22551828 is an abundant number, since it is smaller than the sum of its proper divisors (34117260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22551828 is a wasteful number, since it uses less digits than its factorization.

22551828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144583 (or 144581 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 22551828 is about 4748.8764987100. The cubic root of 22551828 is about 282.5274069528.

The spelling of 22551828 in words is "twenty-two million, five hundred fifty-one thousand, eight hundred twenty-eight".