221234456 has 8 divisors (see below), whose sum is σ = 414814620. Its totient is φ = 110617224.

The previous prime is 221234437. The next prime is 221234459. The reversal of 221234456 is 654432122.

221234456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13827146 + ... + 13827161.

Almost surely, 2^221234456 is an apocalyptic number.

It is an amenable number.

221234456 is a deficient number, since it is larger than the sum of its proper divisors (193580164).

221234456 is a wasteful number, since it uses less digits than its factorization.

221234456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27654313 (or 27654309 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 221234456 is about 14873.9522656219. The cubic root of 221234456 is about 604.8080861133.

Adding to 221234456 its reverse (654432122), we get a palindrome (875666578).

The spelling of 221234456 in words is "two hundred twenty-one million, two hundred thirty-four thousand, four hundred fifty-six".