221423676 has 24 divisors (see below), whose sum is σ = 517050240. Its totient is φ = 73751472.

The previous prime is 221423633. The next prime is 221423681. The reversal of 221423676 is 676324122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11185 + ... + 23831.

It is an arithmetic number, because the mean of its divisors is an integer number (21543760).

Almost surely, 2^221423676 is an apocalyptic number.

It is an amenable number.

221423676 is an abundant number, since it is smaller than the sum of its proper divisors (295626564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221423676 is a wasteful number, since it uses less digits than its factorization.

221423676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14113 (or 14111 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 221423676 is about 14880.3116902839. The cubic root of 221423676 is about 604.9804660952.

Adding to 221423676 its reverse (676324122), we get a palindrome (897747798).

The spelling of 221423676 in words is "two hundred twenty-one million, four hundred twenty-three thousand, six hundred seventy-six".