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230204551 = 1973269617
BaseRepresentation
bin11011011100010…
…10010010000111
3121001011121021111
431232022102013
5432413021201
634502025451
75463464203
oct1556122207
9531147244
10230204551
11108a430a5
1265118287
1338901415
1422805b03
1515323b51
hexdb8a487

230204551 has 16 divisors (see below), whose sum is σ = 246952800. Its totient is φ = 213954048.

The previous prime is 230204549. The next prime is 230204591. The reversal of 230204551 is 155402032.

230204551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 230204551 - 21 = 230204549 is a prime.

It is a super-2 number, since 2×2302045512 = 105988270602223202, 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 (230204591) 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, 372795 + ... + 373411.

It is an arithmetic number, because the mean of its divisors is an integer number (15434550).

Almost surely, 2230204551 is an apocalyptic number.

230204551 is a deficient number, since it is larger than the sum of its proper divisors (16748249).

230204551 is a wasteful number, since it uses less digits than its factorization.

230204551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 230204551 is about 15172.4932361165. The cubic root of 230204551 is about 612.8741468598.

Adding to 230204551 its reverse (155402032), we get a palindrome (385606583).

The spelling of 230204551 in words is "two hundred thirty million, two hundred four thousand, five hundred fifty-one".

Divisors: 1 19 73 269 617 1387 5111 11723 19637 45041 165973 373103 855779 3153487 12116029 230204551