221303423 has 8 divisors (see below), whose sum is σ = 243813456. Its totient is φ = 199192000.

The previous prime is 221303419. The next prime is 221303443. The reversal of 221303423 is 324303122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221303423 - 2² = 221303419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221303395 and 221303404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221303443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98486 + ... + 100707.

It is an arithmetic number, because the mean of its divisors is an integer number (30476682).

Almost surely, 2^221303423 is an apocalyptic number.

221303423 is a deficient number, since it is larger than the sum of its proper divisors (22510033).

221303423 is a wasteful number, since it uses less digits than its factorization.

221303423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199305.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 221303423 is about 14876.2704667534. The cubic root of 221303423 is about 604.8709266347.

Adding to 221303423 its reverse (324303122), we get a palindrome (545606545).

The spelling of 221303423 in words is "two hundred twenty-one million, three hundred three thousand, four hundred twenty-three".