22203981 has 12 divisors (see below), whose sum is σ = 32114940. Its totient is φ = 14783040.

The previous prime is 22203971. The next prime is 22203983. The reversal of 22203981 is 18930222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 2223081 = 4470^2 + 1491^2 .

It is not a de Polignac number, because 22203981 - 2⁵ = 22203949 is a prime.

It is a super-2 number, since 2×22203981² = 986033544496722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22203983) 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 11 ways as a sum of consecutive naturals, for example, 9585 + ... + 11673.

It is an arithmetic number, because the mean of its divisors is an integer number (2676245).

Almost surely, 2^22203981 is an apocalyptic number.

It is an amenable number.

22203981 is a deficient number, since it is larger than the sum of its proper divisors (9910959).

22203981 is a wasteful number, since it uses less digits than its factorization.

22203981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276 (or 3273 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 22203981 is about 4712.1100369155. The cubic root of 22203981 is about 281.0672744958.

The spelling of 22203981 in words is "twenty-two million, two hundred three thousand, nine hundred eighty-one".