21822315 has 8 divisors (see below), whose sum is σ = 34915728. Its totient is φ = 11638560.

The previous prime is 21822293. The next prime is 21822343. The reversal of 21822315 is 51322812.

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

It is not a de Polignac number, because 21822315 - 2¹³ = 21814123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727396 + ... + 727425.

It is an arithmetic number, because the mean of its divisors is an integer number (4364466).

Almost surely, 2^21822315 is an apocalyptic number.

21822315 is a deficient number, since it is larger than the sum of its proper divisors (13093413).

21822315 is a wasteful number, since it uses less digits than its factorization.

21822315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454829.

The product of its digits is 960, while the sum is 24.

The square root of 21822315 is about 4671.4360746991. The cubic root of 21822315 is about 279.4475288271.

The spelling of 21822315 in words is "twenty-one million, eight hundred twenty-two thousand, three hundred fifteen".