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11505213 = 331014219
BaseRepresentation
bin101011111000…
…111000111101
3210122112012000
4223320320331
510421131323
61050332513
7166535616
oct53707075
923575160
1011505213
116549045
123a2a139
1324caa25
141756c0d
151023e43
hexaf8e3d

11505213 has 16 divisors (see below), whose sum is σ = 17217600. Its totient is φ = 7592400.

The previous prime is 11505191. The next prime is 11505217. The reversal of 11505213 is 31250511.

11505213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11505213 - 25 = 11505181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11505217) 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, 618 + ... + 4836.

It is an arithmetic number, because the mean of its divisors is an integer number (1076100).

Almost surely, 211505213 is an apocalyptic number.

It is an amenable number.

11505213 is a deficient number, since it is larger than the sum of its proper divisors (5712387).

11505213 is a wasteful number, since it uses less digits than its factorization.

11505213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329 (or 4323 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 11505213 is about 3391.9335193957. The cubic root of 11505213 is about 225.7519729190.

Adding to 11505213 its reverse (31250511), we get a palindrome (42755724).

The spelling of 11505213 in words is "eleven million, five hundred five thousand, two hundred thirteen".

Divisors: 1 3 9 27 101 303 909 2727 4219 12657 37971 113913 426119 1278357 3835071 11505213