22155706 has 8 divisors (see below), whose sum is σ = 33940800. Its totient is φ = 10842108.

The previous prime is 22155701. The next prime is 22155733. The reversal of 22155706 is 60755122.

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

It is not an unprimeable number, because it can be changed into a prime (22155701) 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 3 ways as a sum of consecutive naturals, for example, 117756 + ... + 117943.

It is an arithmetic number, because the mean of its divisors is an integer number (4242600).

Almost surely, 2^22155706 is an apocalyptic number.

22155706 is a deficient number, since it is larger than the sum of its proper divisors (11785094).

22155706 is a wasteful number, since it uses less digits than its factorization.

22155706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235748.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 22155706 is about 4706.9848098331. The cubic root of 22155706 is about 280.8634316512.

It can be divided in two parts, 2215 and 5706, that added together give a square (7921 = 89²).

The spelling of 22155706 in words is "twenty-two million, one hundred fifty-five thousand, seven hundred six".