285115225 has 12 divisors (see below), whose sum is σ = 355920300. Its totient is φ = 226558400.

The previous prime is 285115213. The next prime is 285115247. The reversal of 285115225 is 522511582.

It can be written as a sum of positive squares in 6 ways, for example, as 71166096 + 213949129 = 8436^2 + 14627^2 .

It is a de Polignac number, because none of the positive numbers 2^k-285115225 is a prime.

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, 34546 + ... + 41995.

It is an arithmetic number, because the mean of its divisors is an integer number (29660025).

Almost surely, 2^285115225 is an apocalyptic number.

285115225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285115225 is a deficient number, since it is larger than the sum of its proper divisors (70805075).

285115225 is a wasteful number, since it uses less digits than its factorization.

285115225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76700 (or 76695 counting only the distinct ones).

The product of its digits is 8000, while the sum is 31.

The square root of 285115225 is about 16885.3553412417. The cubic root of 285115225 is about 658.1731120358.

The spelling of 285115225 in words is "two hundred eighty-five million, one hundred fifteen thousand, two hundred twenty-five".