22149876281 has 4 divisors (see below), whose sum is σ = 23853712932. Its totient is φ = 20446039632.

The previous prime is 22149876209. The next prime is 22149876341. The reversal of 22149876281 is 18267894122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4284880681 + 17864995600 = 65459^2 + 133660^2 .

It is a cyclic number.

It is not a de Polignac number, because 22149876281 - 2²² = 22145681977 is a prime.

It is a super-2 number, since 2×22149876281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22149873281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851918306 + ... + 851918331.

It is an arithmetic number, because the mean of its divisors is an integer number (5963428233).

Almost surely, 2^22149876281 is an apocalyptic number.

It is an amenable number.

22149876281 is a deficient number, since it is larger than the sum of its proper divisors (1703836651).

22149876281 is a wasteful number, since it uses less digits than its factorization.

22149876281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703836650.

The product of its digits is 774144, while the sum is 50.

The spelling of 22149876281 in words is "twenty-two billion, one hundred forty-nine million, eight hundred seventy-six thousand, two hundred eighty-one".