220007231 has 2 divisors, whose sum is σ = 220007232. Its totient is φ = 220007230.

The previous prime is 220007219. The next prime is 220007233. The reversal of 220007231 is 132700022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220007231 - 2¹⁰ = 220006207 is a prime.

It is a super-2 number, since 2×220007231² = 96806363384574722, which contains 22 as substring.

Together with 220007233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220007233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110003615 + 110003616.

It is an arithmetic number, because the mean of its divisors is an integer number (110003616).

Almost surely, 2^220007231 is an apocalyptic number.

220007231 is a deficient number, since it is larger than the sum of its proper divisors (1).

220007231 is an equidigital number, since it uses as much as digits as its factorization.

220007231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 220007231 is about 14832.6407291487. The cubic root of 220007231 is about 603.6876875737.

Adding to 220007231 its reverse (132700022), we get a palindrome (352707253).

The spelling of 220007231 in words is "two hundred twenty million, seven thousand, two hundred thirty-one".