18222552 has 48 divisors (see below), whose sum is σ = 50043240. Its totient is φ = 5989248.

The previous prime is 18222541. The next prime is 18222553. The reversal of 18222552 is 25522281.

It is a super-2 number, since 2×18222552² = 664122802785408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222553) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 3523 + ... + 6989.

Almost surely, 2^18222552 is an apocalyptic number.

18222552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18222552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25021620).

18222552 is an abundant number, since it is smaller than the sum of its proper divisors (31820688).

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

18222552 is a wasteful number, since it uses less digits than its factorization.

18222552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552 (or 3545 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 18222552 is about 4268.7881184242. The cubic root of 18222552 is about 263.1498132030.

The spelling of 18222552 in words is "eighteen million, two hundred twenty-two thousand, five hundred fifty-two".