22259744809 has 3 divisors (see below), whose sum is σ = 22259894007. Its totient is φ = 22259595612.

The previous prime is 22259744807. The next prime is 22259744821. The reversal of 22259744809 is 90844795222.

The square root of 22259744809 is 149197.

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., 406627225 + 21853117584 = 20165^2 + 147828^2 .

It is not a de Polignac number, because 22259744809 - 2¹ = 22259744807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22259744807) 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, 74599 + ... + 223795.

It is an arithmetic number, because the mean of its divisors is an integer number (7419964669).

Almost surely, 2^22259744809 is an apocalyptic number.

22259744809 is the 149197-th square number.

22259744809 is the 74599-th centered octagonal number.

It is an amenable number.

22259744809 is a deficient number, since it is larger than the sum of its proper divisors (149198).

22259744809 is an frugal number, since it uses more digits than its factorization.

22259744809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298394 (or 149197 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 22259744809 in words is "twenty-two billion, two hundred fifty-nine million, seven hundred forty-four thousand, eight hundred nine".