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230808031 = 1713576943
BaseRepresentation
bin11011100000111…
…01100111011111
3121002022021002121
431300131213133
5433041324111
634523003411
75501556466
oct1560354737
9532267077
10230808031
11109315543
1265369567
1338a82ccc
14229219dd
15153e2871
hexdc1d9df

230808031 has 4 divisors (see below), whose sum is σ = 244384992. Its totient is φ = 217231072.

The previous prime is 230807947. The next prime is 230808041. The reversal of 230808031 is 130808032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 230808031 - 29 = 230807519 is a prime.

It is a super-2 number, since 2×2308080312 = 106544694348193922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230807987 and 230808005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230808041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6788455 + ... + 6788488.

It is an arithmetic number, because the mean of its divisors is an integer number (61096248).

Almost surely, 2230808031 is an apocalyptic number.

230808031 is a deficient number, since it is larger than the sum of its proper divisors (13576961).

230808031 is a wasteful number, since it uses less digits than its factorization.

230808031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13576960.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 230808031 is about 15192.3675245170. The cubic root of 230808031 is about 613.4092283275.

Subtracting from 230808031 its reverse (130808032), we obtain a palindrome (99999999).

The spelling of 230808031 in words is "two hundred thirty million, eight hundred eight thousand, thirty-one".

Divisors: 1 17 13576943 230808031