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13231133 = 22735821
BaseRepresentation
bin110010011110…
…010000011101
3220220012200222
4302132100131
511341344013
61151331125
7220314506
oct62362035
926805628
1013231133
117517823
124520aa5
132983496
141a85bad
151265508
hexc9e41d

13231133 has 4 divisors (see below), whose sum is σ = 13239228. Its totient is φ = 13223040.

The previous prime is 13231123. The next prime is 13231147. The reversal of 13231133 is 33113231.

13231133 is digitally balanced in base 2, 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11648569 + 1582564 = 3413^2 + 1258^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231133 - 210 = 13230109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231103) 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, 638 + ... + 5183.

It is an arithmetic number, because the mean of its divisors is an integer number (3309807).

Almost surely, 213231133 is an apocalyptic number.

It is an amenable number.

13231133 is a deficient number, since it is larger than the sum of its proper divisors (8095).

13231133 is an equidigital number, since it uses as much as digits as its factorization.

13231133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8094.

The product of its digits is 162, while the sum is 17.

The square root of 13231133 is about 3637.4624396686. The cubic root of 13231133 is about 236.5188062287.

Adding to 13231133 its reverse (33113231), we get a palindrome (46344364).

The spelling of 13231133 in words is "thirteen million, two hundred thirty-one thousand, one hundred thirty-three".

Divisors: 1 2273 5821 13231133