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21333241 = 29838863
BaseRepresentation
bin101000101100…
…0010011111001
31111010211201001
41101120103321
520430130431
62041125001
7346221016
oct121302371
944124631
1021333241
1111050a86
127189761
13455c227
142b9470d
151d15e61
hex14584f9

21333241 has 8 divisors (see below), whose sum is σ = 22337280. Its totient is φ = 20347152.

The previous prime is 21333199. The next prime is 21333251. The reversal of 21333241 is 14233312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21333241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333251) 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, 2025 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (2792160).

Almost surely, 221333241 is an apocalyptic number.

It is an amenable number.

21333241 is a deficient number, since it is larger than the sum of its proper divisors (1004039).

21333241 is an equidigital number, since it uses as much as digits as its factorization.

21333241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975.

The product of its digits is 432, while the sum is 19.

The square root of 21333241 is about 4618.7921581297. The cubic root of 21333241 is about 277.3441096124.

Adding to 21333241 its reverse (14233312), we get a palindrome (35566553).

The spelling of 21333241 in words is "twenty-one million, three hundred thirty-three thousand, two hundred forty-one".

Divisors: 1 29 83 2407 8863 257027 735629 21333241