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230212221 = 3233336409
BaseRepresentation
bin11011011100011…
…00001001111101
3121001011222210120
431232030021331
5432413242341
634502125153
75463525441
oct1556141175
9531158716
10230212221
11108a48938
12651207b9
1338904a65
1422808821
1515326066
hexdb8c27d

230212221 has 8 divisors (see below), whose sum is σ = 320295360. Its totient is φ = 146801952.

The previous prime is 230212219. The next prime is 230212223. The reversal of 230212221 is 122212032.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (230212219) and next prime (230212223).

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

It is not a de Polignac number, because 230212221 - 21 = 230212219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 230212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230212223) 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, 1668136 + ... + 1668273.

It is an arithmetic number, because the mean of its divisors is an integer number (40036920).

Almost surely, 2230212221 is an apocalyptic number.

It is an amenable number.

230212221 is a deficient number, since it is larger than the sum of its proper divisors (90083139).

230212221 is a wasteful number, since it uses less digits than its factorization.

230212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336435.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 230212221 is about 15172.7459940513. The cubic root of 230212221 is about 612.8809534042.

Adding to 230212221 its reverse (122212032), we get a palindrome (352424253).

The spelling of 230212221 in words is "two hundred thirty million, two hundred twelve thousand, two hundred twenty-one".

Divisors: 1 3 23 69 3336409 10009227 76737407 230212221