22156742 has 16 divisors (see below), whose sum is σ = 34145280. Its totient is φ = 10778952.

The previous prime is 22156727. The next prime is 22156759. The reversal of 22156742 is 24765122.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 11243 + ... + 13065.

It is an arithmetic number, because the mean of its divisors is an integer number (2134080).

Almost surely, 2^22156742 is an apocalyptic number.

22156742 is a deficient number, since it is larger than the sum of its proper divisors (11988538).

22156742 is a wasteful number, since it uses less digits than its factorization.

22156742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987.

The product of its digits is 6720, while the sum is 29.

The square root of 22156742 is about 4707.0948577652. The cubic root of 22156742 is about 280.8678093042.

The spelling of 22156742 in words is "twenty-two million, one hundred fifty-six thousand, seven hundred forty-two".