22236981 has 16 divisors (see below), whose sum is σ = 32229120. Its totient is φ = 13556160.

The previous prime is 22236971. The next prime is 22237027. The reversal of 22236981 is 18963222.

It is a happy number.

It is not a de Polignac number, because 22236981 - 2⁷ = 22236853 is a prime.

It is a super-2 number, since 2×22236981² = 988966647988722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22236961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1636 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (2014320).

Almost surely, 2^22236981 is an apocalyptic number.

It is an amenable number.

22236981 is a deficient number, since it is larger than the sum of its proper divisors (9992139).

22236981 is a wasteful number, since it uses less digits than its factorization.

22236981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5356.

The product of its digits is 10368, while the sum is 33.

The square root of 22236981 is about 4715.6103528600. The cubic root of 22236981 is about 281.2064481699.

The spelling of 22236981 in words is "twenty-two million, two hundred thirty-six thousand, nine hundred eighty-one".