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243121241305 = 590313538397
BaseRepresentation
bin1110001001101100100…
…1111011110011011001
3212020112112111201010201
43202123021323303121
512440403014210210
6303404403542201
723364525311455
oct3423311736331
9766475451121
10243121241305
119411a66a008
123b15098a961
1319c06c25b87
14baa5015665
1564cde9d53a
hex389b27bcd9

243121241305 has 8 divisors (see below), whose sum is σ = 291749261832. Its totient is φ = 194494478208.

The previous prime is 243121241269. The next prime is 243121241317. The reversal of 243121241305 is 503142121342.

It can be written as a sum of positive squares in 4 ways, for example, as 14045094144 + 229076147161 = 118512^2 + 478619^2 .

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 243121241305 - 225 = 243087686873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182367 + ... + 720763.

It is an arithmetic number, because the mean of its divisors is an integer number (36468657729).

Almost surely, 2243121241305 is an apocalyptic number.

It is an amenable number.

243121241305 is a deficient number, since it is larger than the sum of its proper divisors (48628020527).

243121241305 is an equidigital number, since it uses as much as digits as its factorization.

243121241305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628715.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 243121241305 its reverse (503142121342), we get a palindrome (746263362647).

The spelling of 243121241305 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, three hundred five".

Divisors: 1 5 90313 451565 538397 2691985 48624248261 243121241305