22287802681 has 9 divisors (see below), whose sum is σ = 22404709551. Its totient is φ = 22171504992.

The previous prime is 22287802679. The next prime is 22287802703. The reversal of 22287802681 is 18620878222.

The square root of 22287802681 is 149291.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6010125625 + 16277677056 = 77525^2 + 127584^2 .

It is not a de Polignac number, because 22287802681 - 2¹ = 22287802679 is a prime.

It is a super-2 number, since 2×22287802681² (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 (22287802601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 50310846 + ... + 50311288.

Almost surely, 2^22287802681 is an apocalyptic number.

22287802681 is the 149291-st square number.

22287802681 is the 74646-th centered octagonal number.

It is an amenable number.

22287802681 is a deficient number, since it is larger than the sum of its proper divisors (116906870).

22287802681 is an frugal number, since it uses more digits than its factorization.

22287802681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 22287802681 in words is "twenty-two billion, two hundred eighty-seven million, eight hundred two thousand, six hundred eighty-one".