229781225 has 6 divisors (see below), whose sum is σ = 284928750. Its totient is φ = 183824960.

The previous prime is 229781203. The next prime is 229781243. The reversal of 229781225 is 522187922.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4541161 + 225240064 = 2131^2 + 15008^2 .

It is not a de Polignac number, because 229781225 - 2¹² = 229777129 is a prime.

It is a super-2 number, since 2×229781225² = 105598822725001250, which contains 22 as substring.

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, 4595600 + ... + 4595649.

It is an arithmetic number, because the mean of its divisors is an integer number (47488125).

Almost surely, 2^229781225 is an apocalyptic number.

229781225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

229781225 is a deficient number, since it is larger than the sum of its proper divisors (55147525).

229781225 is an equidigital number, since it uses as much as digits as its factorization.

229781225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9191259 (or 9191254 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 229781225 is about 15158.5363739380. The cubic root of 229781225 is about 612.4982423940.

The spelling of 229781225 in words is "two hundred twenty-nine million, seven hundred eighty-one thousand, two hundred twenty-five".