285523231 has 8 divisors (see below), whose sum is σ = 327069344. Its totient is φ = 244166400.

The previous prime is 285523229. The next prime is 285523267. The reversal of 285523231 is 132325582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285523231 - 2¹ = 285523229 is a prime.

It is a super-2 number, since 2×285523231² = 163047030881358722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 285523193 and 285523202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285523831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44070 + ... + 50131.

It is an arithmetic number, because the mean of its divisors is an integer number (40883668).

Almost surely, 2^285523231 is an apocalyptic number.

285523231 is a deficient number, since it is larger than the sum of its proper divisors (41546113).

285523231 is an equidigital number, since it uses as much as digits as its factorization.

285523231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94641.

The product of its digits is 14400, while the sum is 31.

The square root of 285523231 is about 16897.4326748178. The cubic root of 285523231 is about 658.4869156751.

The spelling of 285523231 in words is "two hundred eighty-five million, five hundred twenty-three thousand, two hundred thirty-one".