221263423 has 4 divisors (see below), whose sum is σ = 226409128. Its totient is φ = 216117720.

The previous prime is 221263421. The next prime is 221263447. The reversal of 221263423 is 324362122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221263423 - 2¹ = 221263421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221263421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2572788 + ... + 2572873.

It is an arithmetic number, because the mean of its divisors is an integer number (56602282).

Almost surely, 2^221263423 is an apocalyptic number.

221263423 is a deficient number, since it is larger than the sum of its proper divisors (5145705).

221263423 is an equidigital number, since it uses as much as digits as its factorization.

221263423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145704.

The product of its digits is 3456, while the sum is 25.

The square root of 221263423 is about 14874.9259830091. The cubic root of 221263423 is about 604.8344815064.

The spelling of 221263423 in words is "two hundred twenty-one million, two hundred sixty-three thousand, four hundred twenty-three".