285163231 has 2 divisors, whose sum is σ = 285163232. Its totient is φ = 285163230.

The previous prime is 285163217. The next prime is 285163237. The reversal of 285163231 is 132361582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285163231 - 2¹⁷ = 285032159 is a prime.

It is a super-2 number, since 2×285163231² = 162636136628718722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 285163193 and 285163202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285163237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142581615 + 142581616.

It is an arithmetic number, because the mean of its divisors is an integer number (142581616).

Almost surely, 2^285163231 is an apocalyptic number.

285163231 is a deficient number, since it is larger than the sum of its proper divisors (1).

285163231 is an equidigital number, since it uses as much as digits as its factorization.

285163231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 285163231 is about 16886.7768090894. The cubic root of 285163231 is about 658.2100497163.

The spelling of 285163231 in words is "two hundred eighty-five million, one hundred sixty-three thousand, two hundred thirty-one".