22157943 has 16 divisors (see below), whose sum is σ = 31278720. Its totient is φ = 13928544.

The previous prime is 22157923. The next prime is 22157957. The reversal of 22157943 is 34975122.

It is not a de Polignac number, because 22157943 - 2⁶ = 22157879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22157903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780 + ... + 6702.

It is an arithmetic number, because the mean of its divisors is an integer number (1954920).

Almost surely, 2^22157943 is an apocalyptic number.

22157943 is a deficient number, since it is larger than the sum of its proper divisors (9120777).

22157943 is a wasteful number, since it uses less digits than its factorization.

22157943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998.

The product of its digits is 15120, while the sum is 33.

The square root of 22157943 is about 4707.2224294163. Note that the first 3 decimals coincide. The cubic root of 22157943 is about 280.8728839995.

The spelling of 22157943 in words is "twenty-two million, one hundred fifty-seven thousand, nine hundred forty-three".