18154225 has 6 divisors (see below), whose sum is σ = 22511270. Its totient is φ = 14523360.

The previous prime is 18154219. The next prime is 18154231. The reversal of 18154225 is 52245181.

It is an interprime number because it is at equal distance from previous prime (18154219) and next prime (18154231).

It can be written as a sum of positive squares in 3 ways, for example, as 3500641 + 14653584 = 1871^2 + 3828^2 .

It is not a de Polignac number, because 18154225 - 2⁵ = 18154193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18154193 and 18154202.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363060 + ... + 363109.

Almost surely, 2^18154225 is an apocalyptic number.

It is an amenable number.

18154225 is a deficient number, since it is larger than the sum of its proper divisors (4357045).

18154225 is an equidigital number, since it uses as much as digits as its factorization.

18154225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726179 (or 726174 counting only the distinct ones).

The product of its digits is 3200, while the sum is 28.

The square root of 18154225 is about 4260.7775112061. Note that the first 3 decimals coincide. The cubic root of 18154225 is about 262.8205004368.

The spelling of 18154225 in words is "eighteen million, one hundred fifty-four thousand, two hundred twenty-five".