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21322313 = 191122227
BaseRepresentation
bin101000101010…
…1101001001001
31111010021201022
41101111221021
520424303223
62041002225
7346144115
oct121255111
944107638
1021322313
1111043851
127183375
13455726c
142b90745
151d12ac8
hex1455a49

21322313 has 4 divisors (see below), whose sum is σ = 22444560. Its totient is φ = 20200068.

The previous prime is 21322307. The next prime is 21322319. The reversal of 21322313 is 31322312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21322307) and next prime (21322319).

It is a cyclic number.

It is not a de Polignac number, because 21322313 - 24 = 21322297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21322291 and 21322300.

It is not an unprimeable number, because it can be changed into a prime (21322319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561095 + ... + 561132.

It is an arithmetic number, because the mean of its divisors is an integer number (5611140).

Almost surely, 221322313 is an apocalyptic number.

It is an amenable number.

21322313 is a deficient number, since it is larger than the sum of its proper divisors (1122247).

21322313 is a wasteful number, since it uses less digits than its factorization.

21322313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122246.

The product of its digits is 216, while the sum is 17.

The square root of 21322313 is about 4617.6090133315. The cubic root of 21322313 is about 277.2967448123.

Adding to 21322313 its reverse (31322312), we get a palindrome (52644625).

Subtracting 21322313 from its reverse (31322312), we obtain a palindrome (9999999).

The spelling of 21322313 in words is "twenty-one million, three hundred twenty-two thousand, three hundred thirteen".

Divisors: 1 19 1122227 21322313