22156023 has 8 divisors (see below), whose sum is σ = 29803248. Its totient is φ = 14639744.

The previous prime is 22156019. The next prime is 22156027. The reversal of 22156023 is 32065122.

It is an interprime number because it is at equal distance from previous prime (22156019) and next prime (22156027).

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 22156023 - 2² = 22156019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156027) 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 7 ways as a sum of consecutive naturals, for example, 32340 + ... + 33017.

It is an arithmetic number, because the mean of its divisors is an integer number (3725406).

Almost surely, 2^22156023 is an apocalyptic number.

22156023 is a deficient number, since it is larger than the sum of its proper divisors (7647225).

22156023 is a wasteful number, since it uses less digits than its factorization.

22156023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65473.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22156023 is about 4707.0184830740. The cubic root of 22156023 is about 280.8647711599.

Subtracting 22156023 from its reverse (32065122), we obtain a palindrome (9909099).

The spelling of 22156023 in words is "twenty-two million, one hundred fifty-six thousand, twenty-three".