285169225 has 12 divisors (see below), whose sum is σ = 385756560. Its totient is φ = 207395600.

The previous prime is 285169211. The next prime is 285169253. The reversal of 285169225 is 522961582.

It is not a de Polignac number, because 285169225 - 2¹⁷ = 285038153 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, 518215 + ... + 518764.

It is an arithmetic number, because the mean of its divisors is an integer number (32146380).

Almost surely, 2^285169225 is an apocalyptic number.

285169225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285169225 is a deficient number, since it is larger than the sum of its proper divisors (100587335).

285169225 is a wasteful number, since it uses less digits than its factorization.

285169225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037000 (or 1036995 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 285169225 is about 16886.9542842989. The cubic root of 285169225 is about 658.2146614415.

The spelling of 285169225 in words is "two hundred eighty-five million, one hundred sixty-nine thousand, two hundred twenty-five".