221226623 has 8 divisors (see below), whose sum is σ = 226732800. Its totient is φ = 215788248.

The previous prime is 221226583. The next prime is 221226667. The reversal of 221226623 is 326622122.

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 221226623 - 2²⁰ = 220178047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221226592 and 221226601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221226923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10313 + ... + 23426.

It is an arithmetic number, because the mean of its divisors is an integer number (28341600).

Almost surely, 2^221226623 is an apocalyptic number.

221226623 is a deficient number, since it is larger than the sum of its proper divisors (5506177).

221226623 is an equidigital number, since it uses as much as digits as its factorization.

221226623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33901.

The product of its digits is 3456, while the sum is 26.

The square root of 221226623 is about 14873.6889506269. The cubic root of 221226623 is about 604.8009481088.

Adding to 221226623 its reverse (326622122), we get a palindrome (547848745).

The spelling of 221226623 in words is "two hundred twenty-one million, two hundred twenty-six thousand, six hundred twenty-three".