227221231 has 2 divisors, whose sum is σ = 227221232. Its totient is φ = 227221230.

The previous prime is 227221219. The next prime is 227221237. The reversal of 227221231 is 132122722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 227221231 - 2²³ = 218832623 is a prime.

It is a super-3 number, since 3×227221231³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227221237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113610615 + 113610616.

It is an arithmetic number, because the mean of its divisors is an integer number (113610616).

Almost surely, 2^227221231 is an apocalyptic number.

227221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

227221231 is an equidigital number, since it uses as much as digits as its factorization.

227221231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 22.

The square root of 227221231 is about 15073.8591939821. The cubic root of 227221231 is about 610.2151270253.

Adding to 227221231 its reverse (132122722), we get a palindrome (359343953).

The spelling of 227221231 in words is "two hundred twenty-seven million, two hundred twenty-one thousand, two hundred thirty-one".