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230512445 = 5291938237
BaseRepresentation
bin11011011110101…
…01011100111101
3121001202020121222
431233111130331
5433002344240
634512403125
75466215642
oct1557253475
9531666558
10230512445
11109133459
12652464a5
13389ab5c7
1422885dc9
1515384eb5
hexdbd573d

230512445 has 16 divisors (see below), whose sum is σ = 287670960. Its totient is φ = 177106944.

The previous prime is 230512433. The next prime is 230512459. The reversal of 230512445 is 544215032.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3678724 + 226833721 = 1918^2 + 15061^2 .

It is not a de Polignac number, because 230512445 - 28 = 230512189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23867 + ... + 32103.

It is an arithmetic number, because the mean of its divisors is an integer number (17979435).

Almost surely, 2230512445 is an apocalyptic number.

It is an amenable number.

230512445 is a deficient number, since it is larger than the sum of its proper divisors (57158515).

230512445 is a wasteful number, since it uses less digits than its factorization.

230512445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8464.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 230512445 is about 15182.6362994047. The cubic root of 230512445 is about 613.1472607876.

Adding to 230512445 its reverse (544215032), we get a palindrome (774727477).

The spelling of 230512445 in words is "two hundred thirty million, five hundred twelve thousand, four hundred forty-five".

Divisors: 1 5 29 145 193 965 5597 8237 27985 41185 238873 1194365 1589741 7948705 46102489 230512445