22219966 has 4 divisors (see below), whose sum is σ = 33329952. Its totient is φ = 11109982.

The previous prime is 22219961. The next prime is 22219973. The reversal of 22219966 is 66991222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22219961) by changing a digit.

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 as a sum of consecutive naturals, namely, 5554990 + ... + 5554993.

It is an arithmetic number, because the mean of its divisors is an integer number (8332488).

Almost surely, 2^22219966 is an apocalyptic number.

22219966 is a deficient number, since it is larger than the sum of its proper divisors (11109986).

22219966 is a wasteful number, since it uses less digits than its factorization.

22219966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11109985.

The product of its digits is 23328, while the sum is 37.

The square root of 22219966 is about 4713.8058933308. The cubic root of 22219966 is about 281.1347065876.

The spelling of 22219966 in words is "twenty-two million, two hundred nineteen thousand, nine hundred sixty-six".