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243114215021 = 643378093647
BaseRepresentation
bin1110001001101010111…
…1001000011001101101
3212020112001021201212222
43202122233020121231
512440344214340041
6303403553205125
723364411505616
oct3423257103155
9766461251788
10243114215021
1194116700067
123b14a5607a5
1319c05635a02
14baa4106c0d
1564cd56174b
hex389abc866d

243114215021 has 4 divisors (see below), whose sum is σ = 243492309312. Its totient is φ = 242736120732.

The previous prime is 243114214949. The next prime is 243114215027. The reversal of 243114215021 is 120512411342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120512411342 = 260256205671.

It is a cyclic number.

It is not a de Polignac number, because 243114215021 - 218 = 243113952877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243114215027) 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, 189046181 + ... + 189047466.

It is an arithmetic number, because the mean of its divisors is an integer number (60873077328).

Almost surely, 2243114215021 is an apocalyptic number.

It is an amenable number.

243114215021 is a deficient number, since it is larger than the sum of its proper divisors (378094291).

243114215021 is an equidigital number, since it uses as much as digits as its factorization.

243114215021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378094290.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 243114215021 its reverse (120512411342), we get a palindrome (363626626363).

The spelling of 243114215021 in words is "two hundred forty-three billion, one hundred fourteen million, two hundred fifteen thousand, twenty-one".

Divisors: 1 643 378093647 243114215021