213434323073 has 2 divisors, whose sum is σ = 213434323074. Its totient is φ = 213434323072.

The previous prime is 213434323061. The next prime is 213434323121. The reversal of 213434323073 is 370323434312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184635214864 + 28799108209 = 429692^2 + 169703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213434323073 is a prime.

It is not a weakly prime, because it can be changed into another prime (213434323013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106717161536 + 106717161537.

It is an arithmetic number, because the mean of its divisors is an integer number (106717161537).

Almost surely, 2^213434323073 is an apocalyptic number.

It is an amenable number.

213434323073 is a deficient number, since it is larger than the sum of its proper divisors (1).

213434323073 is an equidigital number, since it uses as much as digits as its factorization.

213434323073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 35.

Adding to 213434323073 its reverse (370323434312), we get a palindrome (583757757385).

The spelling of 213434323073 in words is "two hundred thirteen billion, four hundred thirty-four million, three hundred twenty-three thousand, seventy-three".