243310322143 has 4 divisors (see below), whose sum is σ = 278068939600. Its totient is φ = 208551704688.

The previous prime is 243310322119. The next prime is 243310322173. The reversal of 243310322143 is 341223013342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243310322143 is a prime.

It is a super-2 number, since 2×243310322143² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243310322173) 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, 17379308718 + ... + 17379308731.

It is an arithmetic number, because the mean of its divisors is an integer number (69517234900).

Almost surely, 2^243310322143 is an apocalyptic number.

243310322143 is a deficient number, since it is larger than the sum of its proper divisors (34758617457).

243310322143 is an equidigital number, since it uses as much as digits as its factorization.

243310322143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34758617456.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 243310322143 its reverse (341223013342), we get a palindrome (584533335485).

The spelling of 243310322143 in words is "two hundred forty-three billion, three hundred ten million, three hundred twenty-two thousand, one hundred forty-three".