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230521 = 297949
BaseRepresentation
bin111000010001111001
3102201012211
4320101321
524334041
64535121
71650034
oct702171
9381184
10230521
11148215
12b14a1
1380c05
146001b
1548481
hex38479

230521 has 4 divisors (see below), whose sum is σ = 238500. Its totient is φ = 222544.

The previous prime is 230507. The next prime is 230539. The reversal of 230521 is 125032.

Adding to 230521 its reverse (125032), we get a palindrome (355553).

230521 = 3392 + 3402.

230521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 115600 + 114921 = 340^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 230521 - 27 = 230393 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230501) 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, 3946 + ... + 4003.

It is an arithmetic number, because the mean of its divisors is an integer number (59625).

2230521 is an apocalyptic number.

230521 is the 340-th centered square number.

It is an amenable number.

230521 is a deficient number, since it is larger than the sum of its proper divisors (7979).

230521 is an equidigital number, since it uses as much as digits as its factorization.

230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7978.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 230521 is about 480.1260251226. The cubic root of 230521 is about 61.3154845931.

The spelling of 230521 in words is "two hundred thirty thousand, five hundred twenty-one".

Divisors: 1 29 7949 230521