22159388 has 6 divisors (see below), whose sum is σ = 38778936. Its totient is φ = 11079692.

The previous prime is 22159387. The next prime is 22159391. The reversal of 22159388 is 88395122.

It is a super-3 number, since 3×22159388³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22159387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2769920 + ... + 2769927.

It is an arithmetic number, because the mean of its divisors is an integer number (6463156).

Almost surely, 2^22159388 is an apocalyptic number.

It is an amenable number.

22159388 is a deficient number, since it is larger than the sum of its proper divisors (16619548).

22159388 is a wasteful number, since it uses less digits than its factorization.

22159388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5539851 (or 5539849 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 22159388 is about 4707.3759144560. The cubic root of 22159388 is about 280.8789894473.

The spelling of 22159388 in words is "twenty-two million, one hundred fifty-nine thousand, three hundred eighty-eight".