221432023 has 16 divisors (see below), whose sum is σ = 244224000. Its totient is φ = 199940832.

The previous prime is 221432011. The next prime is 221432033. The reversal of 221432023 is 320234122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221432023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221432033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40986 + ... + 46072.

It is an arithmetic number, because the mean of its divisors is an integer number (15264000).

Almost surely, 2^221432023 is an apocalyptic number.

221432023 is a deficient number, since it is larger than the sum of its proper divisors (22791977).

221432023 is a wasteful number, since it uses less digits than its factorization.

221432023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221432023 is about 14880.5921589163. The cubic root of 221432023 is about 604.9880679750.

Adding to 221432023 its reverse (320234122), we get a palindrome (541666145).

The spelling of 221432023 in words is "two hundred twenty-one million, four hundred thirty-two thousand, twenty-three".