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13212330 = 2353711903
BaseRepresentation
bin110010011001…
…101010101010
3220212020220120
4302121222222
511340243310
61151104110
7220205625
oct62315252
926766816
1013212330
11750468a
124512036
132977a61
141a7cdbc
15125eb70
hexc99aaa

13212330 has 32 divisors (see below), whose sum is σ = 32569344. Its totient is φ = 3427776.

The previous prime is 13212307. The next prime is 13212337. The reversal of 13212330 is 3321231.

13212330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (13212337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4842 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (1017792).

Almost surely, 213212330 is an apocalyptic number.

13212330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13212330 is an abundant number, since it is smaller than the sum of its proper divisors (19357014).

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

13212330 is a wasteful number, since it uses less digits than its factorization.

13212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11950.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 13212330 is about 3634.8768892495. The cubic root of 13212330 is about 236.4067127425.

Adding to 13212330 its reverse (3321231), we get a palindrome (16533561).

The spelling of 13212330 in words is "thirteen million, two hundred twelve thousand, three hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 37 74 111 185 222 370 555 1110 11903 23806 35709 59515 71418 119030 178545 357090 440411 880822 1321233 2202055 2642466 4404110 6606165 13212330