22156554 has 32 divisors (see below), whose sum is σ = 51042816. Its totient is φ = 6280560.

The previous prime is 22156549. The next prime is 22156571. The reversal of 22156554 is 45565122.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3489 + ... + 7515.

It is an arithmetic number, because the mean of its divisors is an integer number (1595088).

Almost surely, 2^22156554 is an apocalyptic number.

22156554 is an abundant number, since it is smaller than the sum of its proper divisors (28886262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22156554 is a wasteful number, since it uses less digits than its factorization.

22156554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170.

The product of its digits is 12000, while the sum is 30.

The square root of 22156554 is about 4707.0748878683. The cubic root of 22156554 is about 280.8670149140.

The spelling of 22156554 in words is "twenty-two million, one hundred fifty-six thousand, five hundred fifty-four".