18146225 has 12 divisors (see below), whose sum is σ = 23825484. Its totient is φ = 13662720.

The previous prime is 18146203. The next prime is 18146239. The reversal of 18146225 is 52264181.

It can be written as a sum of positive squares in 6 ways, for example, as 698896 + 17447329 = 836^2 + 4177^2 .

It is not a de Polignac number, because 18146225 - 2¹² = 18142129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20924 + ... + 21773.

It is an arithmetic number, because the mean of its divisors is an integer number (1985457).

Almost surely, 2^18146225 is an apocalyptic number.

It is an amenable number.

18146225 is a deficient number, since it is larger than the sum of its proper divisors (5679259).

18146225 is a wasteful number, since it uses less digits than its factorization.

18146225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42724 (or 42719 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 18146225 is about 4259.8386119664. The cubic root of 18146225 is about 262.7818891691.

The spelling of 18146225 in words is "eighteen million, one hundred forty-six thousand, two hundred twenty-five".