221225023 has 2 divisors, whose sum is σ = 221225024. Its totient is φ = 221225022.

The previous prime is 221225009. The next prime is 221225027. The reversal of 221225023 is 320522122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221225023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221225027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110612511 + 110612512.

It is an arithmetic number, because the mean of its divisors is an integer number (110612512).

Almost surely, 2^221225023 is an apocalyptic number.

221225023 is a deficient number, since it is larger than the sum of its proper divisors (1).

221225023 is an equidigital number, since it uses as much as digits as its factorization.

221225023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 221225023 is about 14873.6351642764. The cubic root of 221225023 is about 604.7994900506.

Adding to 221225023 its reverse (320522122), we get a palindrome (541747145).

The spelling of 221225023 in words is "two hundred twenty-one million, two hundred twenty-five thousand, twenty-three".