221423246 has 8 divisors (see below), whose sum is σ = 362328984. Its totient is φ = 100646920.

The previous prime is 221423243. The next prime is 221423263. The reversal of 221423246 is 642324122.

It is a happy number.

221423246 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221423243) 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, 5032325 + ... + 5032368.

It is an arithmetic number, because the mean of its divisors is an integer number (45291123).

Almost surely, 2^221423246 is an apocalyptic number.

221423246 is a deficient number, since it is larger than the sum of its proper divisors (140905738).

221423246 is a wasteful number, since it uses less digits than its factorization.

221423246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10064706.

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

The square root of 221423246 is about 14880.2972416548. The cubic root of 221423246 is about 604.9800744752.

Adding to 221423246 its reverse (642324122), we get a palindrome (863747368).

The spelling of 221423246 in words is "two hundred twenty-one million, four hundred twenty-three thousand, two hundred forty-six".