Search a number
-
+
21112133 = 73016019
BaseRepresentation
bin101000010001…
…0010101000101
31110201121101212
41100202111011
520401042013
62032301205
7344310260
oct120422505
943647355
1021112133
1110a0a949
1270a1805
1344b26b3
142b37cd7
151cc06a8
hex1422545

21112133 has 4 divisors (see below), whose sum is σ = 24128160. Its totient is φ = 18096108.

The previous prime is 21112127. The next prime is 21112139. The reversal of 21112133 is 33121112.

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 (21112127) and next prime (21112139).

It is a cyclic number.

It is not a de Polignac number, because 21112133 - 28 = 21111877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508003 + ... + 1508016.

It is an arithmetic number, because the mean of its divisors is an integer number (6032040).

Almost surely, 221112133 is an apocalyptic number.

It is an amenable number.

21112133 is a deficient number, since it is larger than the sum of its proper divisors (3016027).

21112133 is an equidigital number, since it uses as much as digits as its factorization.

21112133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016026.

The product of its digits is 36, while the sum is 14.

The square root of 21112133 is about 4594.7941194356. The cubic root of 21112133 is about 276.3826040420.

Adding to 21112133 its reverse (33121112), we get a palindrome (54233245).

The spelling of 21112133 in words is "twenty-one million, one hundred twelve thousand, one hundred thirty-three".

Divisors: 1 7 3016019 21112133