22909711115281 has 3 divisors (see below), whose sum is σ = 22909715901691. Its totient is φ = 22909706328872.

The previous prime is 22909711115279. The next prime is 22909711115287. The reversal of 22909711115281 is 18251111790922.

The square root of 22909711115281 is 4786409.

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., 10482112036881 + 12427599078400 = 3237609^2 + 3525280^2 .

It is not a de Polignac number, because 22909711115281 - 2¹ = 22909711115279 is a prime.

It is a super-2 number, since 2×22909711115281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22909711115287) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2393205 + ... + 7179613.

Almost surely, 2^{22909711115281} is an apocalyptic number.

22909711115281 is the 4786409-th square number.

22909711115281 is the 2393205-th centered octagonal number.

It is an amenable number.

22909711115281 is a deficient number, since it is larger than the sum of its proper divisors (4786410).

22909711115281 is an frugal number, since it uses more digits than its factorization.

22909711115281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9572818 (or 4786409 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 49.

The spelling of 22909711115281 in words is "twenty-two trillion, nine hundred nine billion, seven hundred eleven million, one hundred fifteen thousand, two hundred eighty-one".