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230453221 = 279782393
BaseRepresentation
bin11011011110001…
…10111111100101
3121001122020101111
431233012333211
5432444000341
634511225021
75465551165
oct1557067745
9531566344
10230453221
111090a2a09
1265218171
133898a66b
142286c5a5
1515372681
hexdbc6fe5

230453221 has 4 divisors (see below), whose sum is σ = 230538412. Its totient is φ = 230368032.

The previous prime is 230453159. The next prime is 230453231. The reversal of 230453221 is 122354032.

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

It can be written as a sum of positive squares in 2 ways, for example, as 189365121 + 41088100 = 13761^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 230453221 - 215 = 230420453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230453192 and 230453201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230453231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 38400 + ... + 43993.

It is an arithmetic number, because the mean of its divisors is an integer number (57634603).

Almost surely, 2230453221 is an apocalyptic number.

It is an amenable number.

230453221 is a deficient number, since it is larger than the sum of its proper divisors (85191).

230453221 is an equidigital number, since it uses as much as digits as its factorization.

230453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85190.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 230453221 is about 15180.6857881981. The cubic root of 230453221 is about 613.0947457001.

The spelling of 230453221 in words is "two hundred thirty million, four hundred fifty-three thousand, two hundred twenty-one".

Divisors: 1 2797 82393 230453221