285664271 has 4 divisors (see below), whose sum is σ = 285736200. Its totient is φ = 285592344.

The previous prime is 285664241. The next prime is 285664273. The reversal of 285664271 is 172466582.

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 285664271 - 2²² = 281469967 is a prime.

It is a super-2 number, since 2×285664271² = 163208151451922882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285664273) 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, 29636 + ... + 38073.

It is an arithmetic number, because the mean of its divisors is an integer number (71434050).

Almost surely, 2^285664271 is an apocalyptic number.

285664271 is a deficient number, since it is larger than the sum of its proper divisors (71929).

285664271 is an equidigital number, since it uses as much as digits as its factorization.

285664271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71928.

The product of its digits is 161280, while the sum is 41.

The square root of 285664271 is about 16901.6055746192. The cubic root of 285664271 is about 658.5953221566.

The spelling of 285664271 in words is "two hundred eighty-five million, six hundred sixty-four thousand, two hundred seventy-one".