285221049 has 16 divisors (see below), whose sum is σ = 403176960. Its totient is φ = 179038080.

The previous prime is 285221039. The next prime is 285221081. The reversal of 285221049 is 940122582.

It is not a de Polignac number, because 285221049 - 2⁴ = 285221033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (285221039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38004 + ... + 44885.

It is an arithmetic number, because the mean of its divisors is an integer number (25198560).

Almost surely, 2^285221049 is an apocalyptic number.

It is an amenable number.

285221049 is a deficient number, since it is larger than the sum of its proper divisors (117955911).

285221049 is a wasteful number, since it uses less digits than its factorization.

285221049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82960.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 285221049 is about 16888.4886535178. The cubic root of 285221049 is about 658.2545316279.

The spelling of 285221049 in words is "two hundred eighty-five million, two hundred twenty-one thousand, forty-nine".