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230111431 = 11101207121
BaseRepresentation
bin11011011011100…
…11100011000111
3121000222212112121
431231303203013
5432402031211
634500030411
75462625544
oct1555634307
9530885477
10230111431
1110898a140
1265092407
133889ac14
14227bdbcb
1515306271
hexdb738c7

230111431 has 8 divisors (see below), whose sum is σ = 253517328. Its totient is φ = 207120000.

The previous prime is 230111383. The next prime is 230111449. The reversal of 230111431 is 134111032.

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

It is a cyclic number.

It is not a de Polignac number, because 230111431 - 219 = 229587143 is a prime.

It is a super-2 number, since 2×2301114312 = 105902541353735522, 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 (230111131) 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 7 ways as a sum of consecutive naturals, for example, 102450 + ... + 104671.

It is an arithmetic number, because the mean of its divisors is an integer number (31689666).

Almost surely, 2230111431 is an apocalyptic number.

230111431 is a deficient number, since it is larger than the sum of its proper divisors (23405897).

230111431 is a wasteful number, since it uses less digits than its factorization.

230111431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207233.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 230111431 is about 15169.4242145178. The cubic root of 230111431 is about 612.7914978457.

Adding to 230111431 its reverse (134111032), we get a palindrome (364222463).

It can be divided in two parts, 23011 and 1431, that added together give a palindrome (24442).

The spelling of 230111431 in words is "two hundred thirty million, one hundred eleven thousand, four hundred thirty-one".

Divisors: 1 11 101 1111 207121 2278331 20919221 230111431