285407035225 has 27 divisors (see below), whose sum is σ = 383268906813. Its totient is φ = 210736475040.

The previous prime is 285407035181. The next prime is 285407035229. The reversal of 285407035225 is 522530704582.

The square root of 285407035225 is 534235.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 73564085529 + 211842949696 = 271227^2 + 460264^2 .

It is not a de Polignac number, because 285407035225 - 2⁷ = 285407035097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285407035229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34721166 + ... + 34729384.

Almost surely, 2^285407035225 is an apocalyptic number.

285407035225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

285407035225 is the 534235-th square number.

285407035225 is the 267118-th centered octagonal number.

It is an amenable number.

285407035225 is a deficient number, since it is larger than the sum of its proper divisors (97861871588).

285407035225 is an frugal number, since it uses more digits than its factorization.

285407035225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16474 (or 8237 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 285407035225 in words is "two hundred eighty-five billion, four hundred seven million, thirty-five thousand, two hundred twenty-five".