221264423 has 2 divisors, whose sum is σ = 221264424. Its totient is φ = 221264422.

The previous prime is 221264411. The next prime is 221264429. The reversal of 221264423 is 324462122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221264423 - 2⁶ = 221264359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221264392 and 221264401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221264429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110632211 + 110632212.

It is an arithmetic number, because the mean of its divisors is an integer number (110632212).

Almost surely, 2^221264423 is an apocalyptic number.

221264423 is a deficient number, since it is larger than the sum of its proper divisors (1).

221264423 is an equidigital number, since it uses as much as digits as its factorization.

221264423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 26.

The square root of 221264423 is about 14874.9595965838. The cubic root of 221264423 is about 604.8353926881.

The spelling of 221264423 in words is "two hundred twenty-one million, two hundred sixty-four thousand, four hundred twenty-three".