22156845 has 16 divisors (see below), whose sum is σ = 35797632. Its totient is φ = 11701440.

The previous prime is 22156829. The next prime is 22156853. The reversal of 22156845 is 54865122.

It is not a de Polignac number, because 22156845 - 2⁴ = 22156829 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5626 + ... + 8715.

It is an arithmetic number, because the mean of its divisors is an integer number (2237352).

Almost surely, 2^22156845 is an apocalyptic number.

It is an amenable number.

22156845 is a deficient number, since it is larger than the sum of its proper divisors (13640787).

22156845 is a wasteful number, since it uses less digits than its factorization.

22156845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14452.

The product of its digits is 19200, while the sum is 33.

The square root of 22156845 is about 4707.1057986835. The cubic root of 22156845 is about 280.8682445267.

The spelling of 22156845 in words is "twenty-two million, one hundred fifty-six thousand, eight hundred forty-five".