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23231105 = 511341117
BaseRepresentation
bin101100010011…
…1101010000001
31121201021002022
41120213222001
521421343410
62145531225
7401314112
oct130475201
947637068
1023231105
1112127967
127943b15
134a75021
14312a209
15208d455
hex1627a81

23231105 has 8 divisors (see below), whose sum is σ = 28124712. Its totient is φ = 18419968.

The previous prime is 23231083. The next prime is 23231107. The reversal of 23231105 is 50113232.

It can be written as a sum of positive squares in 4 ways, for example, as 200704 + 23030401 = 448^2 + 4799^2 .

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 23231105 - 214 = 23214721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23231107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19994 + ... + 21123.

It is an arithmetic number, because the mean of its divisors is an integer number (3515589).

Almost surely, 223231105 is an apocalyptic number.

It is an amenable number.

23231105 is a deficient number, since it is larger than the sum of its proper divisors (4893607).

23231105 is a wasteful number, since it uses less digits than its factorization.

23231105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41235.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 23231105 is about 4819.8656620284. The cubic root of 23231105 is about 285.3360353572.

Adding to 23231105 its reverse (50113232), we get a palindrome (73344337).

The spelling of 23231105 in words is "twenty-three million, two hundred thirty-one thousand, one hundred five".

Divisors: 1 5 113 565 41117 205585 4646221 23231105