285522947 has 4 divisors (see below), whose sum is σ = 288731160. Its totient is φ = 282314736.

The previous prime is 285522931. The next prime is 285522961. The reversal of 285522947 is 749225582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 285522947 - 2⁴ = 285522931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285522898 and 285522907.

It is not an unprimeable number, because it can be changed into a prime (285522907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1603973 + ... + 1604150.

It is an arithmetic number, because the mean of its divisors is an integer number (72182790).

Almost surely, 2^285522947 is an apocalyptic number.

285522947 is a deficient number, since it is larger than the sum of its proper divisors (3208213).

285522947 is an equidigital number, since it uses as much as digits as its factorization.

285522947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208212.

The product of its digits is 403200, while the sum is 44.

The square root of 285522947 is about 16897.4242711722. The cubic root of 285522947 is about 658.4866973504.

The spelling of 285522947 in words is "two hundred eighty-five million, five hundred twenty-two thousand, nine hundred forty-seven".