243428822731 has 2 divisors, whose sum is σ = 243428822732. Its totient is φ = 243428822730.

The previous prime is 243428822729. The next prime is 243428822743. The reversal of 243428822731 is 137228824342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243428822731 - 2¹ = 243428822729 is a prime.

It is a super-2 number, since 2×243428822731² (a number of 24 digits) contains 22 as substring.

Together with 243428822729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (243428822771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121714411365 + 121714411366.

It is an arithmetic number, because the mean of its divisors is an integer number (121714411366).

Almost surely, 2^243428822731 is an apocalyptic number.

243428822731 is a deficient number, since it is larger than the sum of its proper divisors (1).

243428822731 is an equidigital number, since it uses as much as digits as its factorization.

243428822731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1032192, while the sum is 46.

The spelling of 243428822731 in words is "two hundred forty-three billion, four hundred twenty-eight million, eight hundred twenty-two thousand, seven hundred thirty-one".