221066422 has 4 divisors (see below), whose sum is σ = 331599636. Its totient is φ = 110533210.

The previous prime is 221066399. The next prime is 221066441. The reversal of 221066422 is 224660122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55266604 + ... + 55266607.

It is an arithmetic number, because the mean of its divisors is an integer number (82899909).

Almost surely, 2^221066422 is an apocalyptic number.

221066422 is a deficient number, since it is larger than the sum of its proper divisors (110533214).

221066422 is a wasteful number, since it uses less digits than its factorization.

221066422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110533213.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 221066422 is about 14868.3025931005. The cubic root of 221066422 is about 604.6549242227.

The spelling of 221066422 in words is "two hundred twenty-one million, sixty-six thousand, four hundred twenty-two".