228457225 has 6 divisors (see below), whose sum is σ = 283286990. Its totient is φ = 182765760.

The previous prime is 228457219. The next prime is 228457231. The reversal of 228457225 is 522754822.

It is an interprime number because it is at equal distance from previous prime (228457219) and next prime (228457231).

It can be written as a sum of positive squares in 3 ways, for example, as 84681 + 228372544 = 291^2 + 15112^2 .

It is a de Polignac number, because none of the positive numbers 2^k-228457225 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4569120 + ... + 4569169.

Almost surely, 2^228457225 is an apocalyptic number.

228457225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228457225 is a deficient number, since it is larger than the sum of its proper divisors (54829765).

228457225 is an equidigital number, since it uses as much as digits as its factorization.

228457225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138299 (or 9138294 counting only the distinct ones).

The product of its digits is 89600, while the sum is 37.

The square root of 228457225 is about 15114.8015203641. The cubic root of 228457225 is about 611.3195701751.

The spelling of 228457225 in words is "two hundred twenty-eight million, four hundred fifty-seven thousand, two hundred twenty-five".