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215200213 = 19232916981
BaseRepresentation
bin11001101001110…
…11000111010101
3112222221022012021
430310323013111
5420042401323
633204253141
75222112604
oct1464730725
9488838167
10215200213
11100525118
12600a11b1
1335779b07
142081ba3b
1513d5d05d
hexcd3b1d5

215200213 has 16 divisors (see below), whose sum is σ = 244540800. Its totient is φ = 188274240.

The previous prime is 215200207. The next prime is 215200241. The reversal of 215200213 is 312002512.

It is a cyclic number.

It is not a de Polignac number, because 215200213 - 221 = 213103061 is a prime.

It is a super-2 number, since 2×2152002132 = 92622263350490738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215200243) 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, 4183 + ... + 21163.

It is an arithmetic number, because the mean of its divisors is an integer number (15283800).

Almost surely, 2215200213 is an apocalyptic number.

215200213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

215200213 is a deficient number, since it is larger than the sum of its proper divisors (29340587).

215200213 is a wasteful number, since it uses less digits than its factorization.

215200213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17052.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 215200213 is about 14669.7039165758. The cubic root of 215200213 is about 599.2585405888.

Adding to 215200213 its reverse (312002512), we get a palindrome (527202725).

The spelling of 215200213 in words is "two hundred fifteen million, two hundred thousand, two hundred thirteen".

Divisors: 1 19 23 29 437 551 667 12673 16981 322639 390563 492449 7420697 9356531 11326327 215200213