22156219 has 4 divisors (see below), whose sum is σ = 23459544. Its totient is φ = 20852896.

The previous prime is 22156217. The next prime is 22156231. The reversal of 22156219 is 91265122.

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

It is a cyclic number.

It is not a de Polignac number, because 22156219 - 2¹ = 22156217 is a prime.

It is a super-3 number, since 3×22156219³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22156213) 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 in 3 ways as a sum of consecutive naturals, for example, 651637 + ... + 651670.

It is an arithmetic number, because the mean of its divisors is an integer number (5864886).

Almost surely, 2^22156219 is an apocalyptic number.

22156219 is a deficient number, since it is larger than the sum of its proper divisors (1303325).

22156219 is a wasteful number, since it uses less digits than its factorization.

22156219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303324.

The product of its digits is 2160, while the sum is 28.

The square root of 22156219 is about 4707.0393030014. The cubic root of 22156219 is about 280.8655993671.

The spelling of 22156219 in words is "twenty-two million, one hundred fifty-six thousand, two hundred nineteen".