22921051609 has 3 divisors (see below), whose sum is σ = 22921203007. Its totient is φ = 22920900212.

The previous prime is 22921051583. The next prime is 22921051613. The reversal of 22921051609 is 90615012922.

The square root of 22921051609 is 151397.

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., 21490094025 + 1430957584 = 146595^2 + 37828^2 .

It is not a de Polignac number, because 22921051609 - 2¹³ = 22921043417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22921051409) 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, 75699 + ... + 227095.

Almost surely, 2^22921051609 is an apocalyptic number.

22921051609 is the 151397-th square number.

22921051609 is the 75699-th centered octagonal number.

It is an amenable number.

22921051609 is a deficient number, since it is larger than the sum of its proper divisors (151398).

22921051609 is an frugal number, since it uses more digits than its factorization.

22921051609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302794 (or 151397 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 22921051609 in words is "twenty-two billion, nine hundred twenty-one million, fifty-one thousand, six hundred nine".