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13243355 = 531431987
BaseRepresentation
bin110010100001…
…001111011011
3220220211110122
4302201033123
511342241410
61151503455
7220365236
oct62411733
926824418
1013243355
117525a24
124527b8b
132988c08
141a8a41d
151268e55
hexca13db

13243355 has 16 divisors (see below), whose sum is σ = 16794624. Its totient is φ = 10009440.

The previous prime is 13243339. The next prime is 13243381. The reversal of 13243355 is 55334231.

It is not a de Polignac number, because 13243355 - 24 = 13243339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5672 + ... + 7658.

It is an arithmetic number, because the mean of its divisors is an integer number (1049664).

Almost surely, 213243355 is an apocalyptic number.

13243355 is a deficient number, since it is larger than the sum of its proper divisors (3551269).

13243355 is a wasteful number, since it uses less digits than its factorization.

13243355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066.

The product of its digits is 5400, while the sum is 26.

The square root of 13243355 is about 3639.1420692246. The cubic root of 13243355 is about 236.5916103547.

Adding to 13243355 its reverse (55334231), we get a palindrome (68577586).

The spelling of 13243355 in words is "thirteen million, two hundred forty-three thousand, three hundred fifty-five".

Divisors: 1 5 31 43 155 215 1333 1987 6665 9935 61597 85441 307985 427205 2648671 13243355