Search a number
-
+
243121230545 = 5109446094001
BaseRepresentation
bin1110001001101100100…
…1111001001011010001
3212020112112111011101012
43202123021321023101
512440403013334140
6303404403420305
723364525235214
oct3423311711321
9766475434335
10243121230545
119411a661a16
123b150984695
1319c06c20ccb
14baa501177b
1564cde9a265
hex389b2792d1

243121230545 has 8 divisors (see below), whose sum is σ = 294422041320. Its totient is φ = 192712608000.

The previous prime is 243121230529. The next prime is 243121230559. The reversal of 243121230545 is 545032121342.

243121230545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 126633492736 + 116487737809 = 355856^2 + 341303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243121230545 - 24 = 243121230529 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 223046456 + ... + 223047545.

It is an arithmetic number, because the mean of its divisors is an integer number (36802755165).

Almost surely, 2243121230545 is an apocalyptic number.

It is an amenable number.

243121230545 is a deficient number, since it is larger than the sum of its proper divisors (51300810775).

243121230545 is a wasteful number, since it uses less digits than its factorization.

243121230545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446094115.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 243121230545 its reverse (545032121342), we get a palindrome (788153351887).

The spelling of 243121230545 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty thousand, five hundred forty-five".

Divisors: 1 5 109 545 446094001 2230470005 48624246109 243121230545