18227152 has 10 divisors (see below), whose sum is σ = 35315138. Its totient is φ = 9113568.

The previous prime is 18227147. The next prime is 18227159. The reversal of 18227152 is 25172281.

It can be written as a sum of positive squares in only one way, i.e., 17673616 + 553536 = 4204^2 + 744^2 .

It is a super-2 number, since 2×18227152² = 664458140062208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18227152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569583 + ... + 569614.

Almost surely, 2^18227152 is an apocalyptic number.

It is an amenable number.

18227152 is a deficient number, since it is larger than the sum of its proper divisors (17087986).

18227152 is a wasteful number, since it uses less digits than its factorization.

18227152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139205 (or 1139199 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 18227152 is about 4269.3268790291. The cubic root of 18227152 is about 263.1719540334.

The spelling of 18227152 in words is "eighteen million, two hundred twenty-seven thousand, one hundred fifty-two".