21822122317 has 8 divisors (see below), whose sum is σ = 22042334232. Its totient is φ = 21601992000.

The previous prime is 21822122303. The next prime is 21822122341. The reversal of 21822122317 is 71322122812.

It can be written as a sum of positive squares in 4 ways, for example, as 20475892836 + 1346229481 = 143094^2 + 36691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21822122317 - 2²³ = 21813733709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822122017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616767 + ... + 651187.

It is an arithmetic number, because the mean of its divisors is an integer number (2755291779).

Almost surely, 2^21822122317 is an apocalyptic number.

It is an amenable number.

21822122317 is a deficient number, since it is larger than the sum of its proper divisors (220211915).

21822122317 is a wasteful number, since it uses less digits than its factorization.

21822122317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40799.

The product of its digits is 5376, while the sum is 31.

The spelling of 21822122317 in words is "twenty-one billion, eight hundred twenty-two million, one hundred twenty-two thousand, three hundred seventeen".