22360981 has 4 divisors (see below), whose sum is σ = 22372012. Its totient is φ = 22349952.

The previous prime is 22360979. The next prime is 22360993. The reversal of 22360981 is 18906322.

It is the 1931-st star number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5958481 + 16402500 = 2441^2 + 4050^2 .

It is a cyclic number.

It is not a de Polignac number, because 22360981 - 2¹ = 22360979 is a prime.

It is a super-2 number, since 2×22360981² = 1000026942564722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22360381) 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 3 ways as a sum of consecutive naturals, for example, 1500 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (5593003).

Almost surely, 2^22360981 is an apocalyptic number.

It is an amenable number.

22360981 is a deficient number, since it is larger than the sum of its proper divisors (11031).

22360981 is an equidigital number, since it uses as much as digits as its factorization.

22360981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11030.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22360981 is about 4728.7398955747. The cubic root of 22360981 is about 281.7281764448.

The spelling of 22360981 in words is "twenty-two million, three hundred sixty thousand, nine hundred eighty-one".