225219987 has 8 divisors (see below), whose sum is σ = 333659280. Its totient is φ = 150146640.

The previous prime is 225219983. The next prime is 225219989. The reversal of 225219987 is 789912522.

It is a happy number.

It is not a de Polignac number, because 225219987 - 2² = 225219983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225219983) 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, 4170714 + ... + 4170767.

It is an arithmetic number, because the mean of its divisors is an integer number (41707410).

Almost surely, 2^225219987 is an apocalyptic number.

225219987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

225219987 is a deficient number, since it is larger than the sum of its proper divisors (108439293).

225219987 is an equidigital number, since it uses as much as digits as its factorization.

225219987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8341490 (or 8341484 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 225219987 is about 15007.3311084949. The cubic root of 225219987 is about 608.4183580080.

The spelling of 225219987 in words is "two hundred twenty-five million, two hundred nineteen thousand, nine hundred eighty-seven".