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231044081 = 233998779
BaseRepresentation
bin11011100010101…
…11001111110001
3121002202020220012
431301113033301
5433121402311
634532024305
75503561622
oct1561271761
9532666805
10231044081
11109466924
1265462095
1338b36598
1422983a49
151543c78b
hexdc573f1

231044081 has 4 divisors (see below), whose sum is σ = 231145200. Its totient is φ = 230942964.

The previous prime is 231044063. The next prime is 231044083. The reversal of 231044081 is 180440132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231044081 - 214 = 231027697 is a prime.

It is a super-2 number, since 2×2310440812 = 106762734730269122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231044083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47051 + ... + 51728.

It is an arithmetic number, because the mean of its divisors is an integer number (57786300).

Almost surely, 2231044081 is an apocalyptic number.

It is an amenable number.

231044081 is a deficient number, since it is larger than the sum of its proper divisors (101119).

231044081 is an equidigital number, since it uses as much as digits as its factorization.

231044081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101118.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 231044081 is about 15200.1342428283. The cubic root of 231044081 is about 613.6182706132.

The spelling of 231044081 in words is "two hundred thirty-one million, forty-four thousand, eighty-one".

Divisors: 1 2339 98779 231044081