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230220215 = 546044043
BaseRepresentation
bin11011011100011…
…10000110110111
3121001012101202122
431232032012313
5432414021330
634502230155
75463560651
oct1556160667
9531171678
10230220215
11108a53945
126512535b
13389085a4
142280b6d1
15153285e5
hexdb8e1b7

230220215 has 4 divisors (see below), whose sum is σ = 276264264. Its totient is φ = 184176168.

The previous prime is 230220203. The next prime is 230220223. The reversal of 230220215 is 512022032.

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

It is a cyclic number.

It is not a de Polignac number, because 230220215 - 216 = 230154679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230220193 and 230220202.

It is a congruent number.

It is an unprimeable number.

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, 23022017 + ... + 23022026.

It is an arithmetic number, because the mean of its divisors is an integer number (69066066).

Almost surely, 2230220215 is an apocalyptic number.

230220215 is a deficient number, since it is larger than the sum of its proper divisors (46044049).

230220215 is an equidigital number, since it uses as much as digits as its factorization.

230220215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46044048.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 230220215 is about 15173.0094246329. The cubic root of 230220215 is about 612.8880473132. Note that the first 3 decimals are identical.

Adding to 230220215 its reverse (512022032), we get a palindrome (742242247).

The spelling of 230220215 in words is "two hundred thirty million, two hundred twenty thousand, two hundred fifteen".

Divisors: 1 5 46044043 230220215