285223547 has 16 divisors (see below), whose sum is σ = 329121792. Its totient is φ = 242126880.

The previous prime is 285223541. The next prime is 285223559. The reversal of 285223547 is 745322582.

It is not a de Polignac number, because 285223547 - 2¹⁸ = 284961403 is a prime.

It is a super-2 number, since 2×285223547² = 162704943526522418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285223547.

It is not an unprimeable number, because it can be changed into a prime (285223541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511793 + ... + 512349.

It is an arithmetic number, because the mean of its divisors is an integer number (20570112).

Almost surely, 2^285223547 is an apocalyptic number.

285223547 is a deficient number, since it is larger than the sum of its proper divisors (43898245).

285223547 is a wasteful number, since it uses less digits than its factorization.

285223547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138.

The product of its digits is 134400, while the sum is 38.

The square root of 285223547 is about 16888.5626090559. The cubic root of 285223547 is about 658.2564533129.

The spelling of 285223547 in words is "two hundred eighty-five million, two hundred twenty-three thousand, five hundred forty-seven".