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242230423 = 287984137
BaseRepresentation
bin11100111000000…
…10010010010111
3121212210120200011
432130002102113
5444002333143
640011501051
76000632101
oct1634022227
9555716604
10242230423
11114807336
1269157787
133b252116
1424256571
15163ebe9d
hexe702497

242230423 has 4 divisors (see below), whose sum is σ = 242317440. Its totient is φ = 242143408.

The previous prime is 242230409. The next prime is 242230427. The reversal of 242230423 is 324032242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324032242 = 2162016121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-242230423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242230394 and 242230403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242230427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39190 + ... + 44947.

It is an arithmetic number, because the mean of its divisors is an integer number (60579360).

Almost surely, 2242230423 is an apocalyptic number.

242230423 is a deficient number, since it is larger than the sum of its proper divisors (87017).

242230423 is an equidigital number, since it uses as much as digits as its factorization.

242230423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87016.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 242230423 is about 15563.7534997185. The cubic root of 242230423 is about 623.3656911402.

Adding to 242230423 its reverse (324032242), we get a palindrome (566262665).

The spelling of 242230423 in words is "two hundred forty-two million, two hundred thirty thousand, four hundred twenty-three".

Divisors: 1 2879 84137 242230423