221132423 has 2 divisors, whose sum is σ = 221132424. Its totient is φ = 221132422.

The previous prime is 221132399. The next prime is 221132437. The reversal of 221132423 is 324231122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221132423 - 2⁸ = 221132167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221132395 and 221132404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211132423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110566211 + 110566212.

It is an arithmetic number, because the mean of its divisors is an integer number (110566212).

Almost surely, 2^221132423 is an apocalyptic number.

221132423 is a deficient number, since it is larger than the sum of its proper divisors (1).

221132423 is an equidigital number, since it uses as much as digits as its factorization.

221132423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 221132423 is about 14870.5219477999. The cubic root of 221132423 is about 604.7150929544.

Adding to 221132423 its reverse (324231122), we get a palindrome (545363545).

The spelling of 221132423 in words is "two hundred twenty-one million, one hundred thirty-two thousand, four hundred twenty-three".