225242187 has 8 divisors (see below), whose sum is σ = 310010880. Its totient is φ = 145317480.

The previous prime is 225242167. The next prime is 225242239. The reversal of 225242187 is 781242522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225242187 - 2²⁶ = 158133323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225242107) 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, 1210887 + ... + 1211072.

It is an arithmetic number, because the mean of its divisors is an integer number (38751360).

Almost surely, 2^225242187 is an apocalyptic number.

225242187 is a deficient number, since it is larger than the sum of its proper divisors (84768693).

225242187 is a wasteful number, since it uses less digits than its factorization.

225242187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421993.

The product of its digits is 17920, while the sum is 33.

The square root of 225242187 is about 15008.0707287779. The cubic root of 225242187 is about 608.4383480098.

The spelling of 225242187 in words is "two hundred twenty-five million, two hundred forty-two thousand, one hundred eighty-seven".