22156142 has 8 divisors (see below), whose sum is σ = 33263832. Its totient is φ = 11068200.

The previous prime is 22156139. The next prime is 22156159. The reversal of 22156142 is 24165122.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709 + ... + 6872.

It is an arithmetic number, because the mean of its divisors is an integer number (4157979).

Almost surely, 2^22156142 is an apocalyptic number.

22156142 is a deficient number, since it is larger than the sum of its proper divisors (11107690).

22156142 is a wasteful number, since it uses less digits than its factorization.

22156142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9874.

The product of its digits is 960, while the sum is 23.

The square root of 22156142 is about 4707.0311237552. The cubic root of 22156142 is about 280.8652740006.

The spelling of 22156142 in words is "twenty-two million, one hundred fifty-six thousand, one hundred forty-two".