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13210144 = 25537789
BaseRepresentation
bin110010011001…
…001000100000
3220212010220121
4302121020200
511340211034
61151050024
7220166353
oct62311040
926763817
1013210144
117502a82
124510914
132976a6c
141a7c29a
15125e1b4
hexc99220

13210144 has 24 divisors (see below), whose sum is σ = 26501580. Its totient is φ = 6479616.

The previous prime is 13210129. The next prime is 13210151. The reversal of 13210144 is 44101231.

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 336400 = 3588^2 + 580^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2199 + ... + 5590.

Almost surely, 213210144 is an apocalyptic number.

It is an amenable number.

13210144 is an abundant number, since it is smaller than the sum of its proper divisors (13291436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13210144 is an equidigital number, since it uses as much as digits as its factorization.

13210144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852 (or 7844 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 13210144 is about 3634.5761788687. The cubic root of 13210144 is about 236.3936740739.

Adding to 13210144 its reverse (44101231), we get a palindrome (57311375).

The spelling of 13210144 in words is "thirteen million, two hundred ten thousand, one hundred forty-four".

Divisors: 1 2 4 8 16 32 53 106 212 424 848 1696 7789 15578 31156 62312 124624 249248 412817 825634 1651268 3302536 6605072 13210144