21322319 has 2 divisors, whose sum is σ = 21322320. Its totient is φ = 21322318.

The previous prime is 21322307. The next prime is 21322331. The reversal of 21322319 is 91322312.

It is a balanced prime because it is at equal distance from previous prime (21322307) and next prime (21322331).

It is a cyclic number.

It is not a de Polignac number, because 21322319 - 2¹² = 21318223 is a prime.

It is a super-2 number, since 2×21322319² = 909282575075522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21322294 and 21322303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661159 + 10661160.

It is an arithmetic number, because the mean of its divisors is an integer number (10661160).

It is a self-describing number.

Almost surely, 2^21322319 is an apocalyptic number.

21322319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322319 is an equidigital number, since it uses as much as digits as its factorization.

21322319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 21322319 is about 4617.6096630183. The cubic root of 21322319 is about 277.2967708223.

The spelling of 21322319 in words is "twenty-one million, three hundred twenty-two thousand, three hundred nineteen".