221485231 has 8 divisors (see below), whose sum is σ = 255833424. Its totient is φ = 189505920.

The previous prime is 221485211. The next prime is 221485247. The reversal of 221485231 is 132584122.

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 221485231 - 2¹⁵ = 221452463 is a prime.

It is a super-2 number, since 2×221485231² = 98111415102246722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221485231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221485211) 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, 592020 + ... + 592393.

It is an arithmetic number, because the mean of its divisors is an integer number (31979178).

Almost surely, 2^221485231 is an apocalyptic number.

221485231 is a deficient number, since it is larger than the sum of its proper divisors (34348193).

221485231 is a wasteful number, since it uses less digits than its factorization.

221485231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184441.

The product of its digits is 3840, while the sum is 28.

The square root of 221485231 is about 14882.3798836073. The cubic root of 221485231 is about 605.0365217121.

The spelling of 221485231 in words is "two hundred twenty-one million, four hundred eighty-five thousand, two hundred thirty-one".