22081252861 has 8 divisors (see below), whose sum is σ = 22139461944. Its totient is φ = 22023121920.

The previous prime is 22081252841. The next prime is 22081252873. The reversal of 22081252861 is 16825218022.

It can be written as a sum of positive squares in 4 ways, for example, as 1665129636 + 20416123225 = 40806^2 + 142885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22081252861 - 2⁷ = 22081252733 is a prime.

It is a super-4 number, since 4×22081252861⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22081252861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22081252841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569485 + ... + 607021.

It is an arithmetic number, because the mean of its divisors is an integer number (2767432743).

Almost surely, 2^22081252861 is an apocalyptic number.

It is an amenable number.

22081252861 is a deficient number, since it is larger than the sum of its proper divisors (58209083).

22081252861 is an equidigital number, since it uses as much as digits as its factorization.

22081252861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39071.

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 22081252861 in words is "twenty-two billion, eighty-one million, two hundred fifty-two thousand, eight hundred sixty-one".