22043043961 has 3 divisors (see below), whose sum is σ = 22043192431. Its totient is φ = 22042895492.

The previous prime is 22043043929. The next prime is 22043043973. The reversal of 22043043961 is 16934034022.

It is a happy number.

The square root of 22043043961 is 148469.

It is a perfect power (a square), and thus also a powerful 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 only one way, i.e., 6403040361 + 15640003600 = 80019^2 + 125060^2 .

It is not a de Polignac number, because 22043043961 - 2⁵ = 22043043929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22043043361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 74235 + ... + 222703.

Almost surely, 2^22043043961 is an apocalyptic number.

22043043961 is the 148469-th square number.

22043043961 is the 74235-th centered octagonal number.

It is an amenable number.

22043043961 is a deficient number, since it is larger than the sum of its proper divisors (148470).

22043043961 is an frugal number, since it uses more digits than its factorization.

22043043961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296938 (or 148469 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 22043043961 its reverse (16934034022), we get a palindrome (38977077983).

The spelling of 22043043961 in words is "twenty-two billion, forty-three million, forty-three thousand, nine hundred sixty-one".