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13205433 = 34401811
BaseRepresentation
bin110010010111…
…111110111001
3220211220110010
4302113332321
511340033213
61151012133
7220146543
oct62277671
926756403
1013205433
1174aa48a
12450a049
132974887
141a7a693
15125cac3
hexc97fb9

13205433 has 4 divisors (see below), whose sum is σ = 17607248. Its totient is φ = 8803620.

The previous prime is 13205419. The next prime is 13205461. The reversal of 13205433 is 33450231.

13205433 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33450231 = 311150077.

It is not a de Polignac number, because 13205433 - 210 = 13204409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13200433) 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, 2200903 + ... + 2200908.

It is an arithmetic number, because the mean of its divisors is an integer number (4401812).

Almost surely, 213205433 is an apocalyptic number.

It is an amenable number.

13205433 is a deficient number, since it is larger than the sum of its proper divisors (4401815).

13205433 is an equidigital number, since it uses as much as digits as its factorization.

13205433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401814.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 13205433 is about 3633.9280400140. The cubic root of 13205433 is about 236.3655698380.

Adding to 13205433 its reverse (33450231), we get a palindrome (46655664).

The spelling of 13205433 in words is "thirteen million, two hundred five thousand, four hundred thirty-three".

Divisors: 1 3 4401811 13205433