22721743493289 has 15 divisors (see below), whose sum is σ = 33942421650247. Its totient is φ = 15147800395128.

The previous prime is 22721743493279. The next prime is 22721743493369. The reversal of 22721743493289 is 98239434712722.

It is a happy number.

The square root of 22721743493289 is 4766733.

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

22721743493289 is a `hidden beast` number, since 2 + 2 + 7 + 2 + 1 + 7 + 4 + 349 + 3 + 289 = 666.

It can be written as a sum of positive squares in only one way, i.e., 736035305625 + 21985708187664 = 857925^2 + 4688892^2 .

It is not a de Polignac number, because 22721743493289 - 2¹¹ = 22721743491241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22721743493219) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 42635779 + ... + 43165415.

Almost surely, 2^{22721743493289} is an apocalyptic number.

22721743493289 is the 4766733-rd square number.

22721743493289 is the 2383367-th centered octagonal number.

It is an amenable number.

22721743493289 is a deficient number, since it is larger than the sum of its proper divisors (11220678156958).

22721743493289 is an frugal number, since it uses more digits than its factorization.

22721743493289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059286 (or 529640 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 22721743493289 in words is "twenty-two trillion, seven hundred twenty-one billion, seven hundred forty-three million, four hundred ninety-three thousand, two hundred eighty-nine".