22156005 has 8 divisors (see below), whose sum is σ = 35449632. Its totient is φ = 11816528.

The previous prime is 22156003. The next prime is 22156009. The reversal of 22156005 is 50065122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22156005 - 2¹ = 22156003 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738519 + ... + 738548.

It is an arithmetic number, because the mean of its divisors is an integer number (4431204).

Almost surely, 2^22156005 is an apocalyptic number.

It is an amenable number.

22156005 is a deficient number, since it is larger than the sum of its proper divisors (13293627).

22156005 is a wasteful number, since it uses less digits than its factorization.

22156005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477075.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 22156005 is about 4707.0165710352. The cubic root of 22156005 is about 280.8646950998.

The spelling of 22156005 in words is "twenty-two million, one hundred fifty-six thousand, five".