224215231 has 4 divisors (see below), whose sum is σ = 227373264. Its totient is φ = 221057200.

The previous prime is 224215217. The next prime is 224215237. The reversal of 224215231 is 132512422.

It is a happy number.

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 224215231 - 2²¹ = 222118079 is a prime.

It is a super-2 number, since 2×224215231² = 100544939624766722, 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 (224215237) 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, 1578910 + ... + 1579051.

It is an arithmetic number, because the mean of its divisors is an integer number (56843316).

Almost surely, 2^224215231 is an apocalyptic number.

224215231 is a deficient number, since it is larger than the sum of its proper divisors (3158033).

224215231 is an equidigital number, since it uses as much as digits as its factorization.

224215231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158032.

The product of its digits is 960, while the sum is 22.

The square root of 224215231 is about 14973.8181837499. The cubic root of 224215231 is about 607.5122464183.

Adding to 224215231 its reverse (132512422), we get a palindrome (356727653).

The spelling of 224215231 in words is "two hundred twenty-four million, two hundred fifteen thousand, two hundred thirty-one".