243134289321 has 128 divisors (see below), whose sum is σ = 425692495872. Its totient is φ = 119768544000.

The previous prime is 243134289269. The next prime is 243134289421. The reversal of 243134289321 is 123982431342.

It is not a de Polignac number, because 243134289321 - 2¹¹ = 243134287273 is a prime.

It is a super-2 number, since 2×243134289321² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243134289421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 75482491 + ... + 75485711.

It is an arithmetic number, because the mean of its divisors is an integer number (3325722624).

Almost surely, 2^243134289321 is an apocalyptic number.

243134289321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243134289321 is a deficient number, since it is larger than the sum of its proper divisors (182558206551).

243134289321 is a wasteful number, since it uses less digits than its factorization.

243134289321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483.

The product of its digits is 248832, while the sum is 42.

The spelling of 243134289321 in words is "two hundred forty-three billion, one hundred thirty-four million, two hundred eighty-nine thousand, three hundred twenty-one".