243226340837 has 2 divisors, whose sum is σ = 243226340838. Its totient is φ = 243226340836.

The previous prime is 243226340813. The next prime is 243226340873. The reversal of 243226340837 is 738043622342.

Together with next prime (243226340873) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239709139201 + 3517201636 = 489601^2 + 59306^2 .

It is a cyclic number.

It is not a de Polignac number, because 243226340837 - 2¹⁰ = 243226339813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243226340807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121613170418 + 121613170419.

It is an arithmetic number, because the mean of its divisors is an integer number (121613170419).

Almost surely, 2^243226340837 is an apocalyptic number.

It is an amenable number.

243226340837 is a deficient number, since it is larger than the sum of its proper divisors (1).

243226340837 is an equidigital number, since it uses as much as digits as its factorization.

243226340837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 44.

The spelling of 243226340837 in words is "two hundred forty-three billion, two hundred twenty-six million, three hundred forty thousand, eight hundred thirty-seven".