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213042243 = 3107663683
BaseRepresentation
bin11001011001011…
…00010001000011
3112211212200000110
430230230101003
5414014322433
633050122403
75164554261
oct1454542103
9484780013
10213042243
11aa290877
125b420403
13351a27cb
1420419431
1513a83963
hexcb2c443

213042243 has 8 divisors (see below), whose sum is σ = 286711488. Its totient is φ = 140700584.

The previous prime is 213042241. The next prime is 213042259. The reversal of 213042243 is 342240312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213042243 - 21 = 213042241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213042241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331521 + ... + 332162.

It is an arithmetic number, because the mean of its divisors is an integer number (35838936).

Almost surely, 2213042243 is an apocalyptic number.

213042243 is a deficient number, since it is larger than the sum of its proper divisors (73669245).

213042243 is a wasteful number, since it uses less digits than its factorization.

213042243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663793.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 213042243 is about 14595.9666689123. The cubic root of 213042243 is about 597.2487396716.

Adding to 213042243 its reverse (342240312), we get a palindrome (555282555).

The spelling of 213042243 in words is "two hundred thirteen million, forty-two thousand, two hundred forty-three".

Divisors: 1 3 107 321 663683 1991049 71014081 213042243