213431320133 has 2 divisors, whose sum is σ = 213431320134. Its totient is φ = 213431320132.

The previous prime is 213431320093. The next prime is 213431320147. The reversal of 213431320133 is 331023134312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161235977764 + 52195342369 = 401542^2 + 228463^2 .

It is a cyclic number.

It is not a de Polignac number, because 213431320133 - 2⁸ = 213431319877 is a prime.

It is a super-2 number, since 2×213431320133² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213431322133) 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 as a sum of consecutive naturals, namely, 106715660066 + 106715660067.

It is an arithmetic number, because the mean of its divisors is an integer number (106715660067).

Almost surely, 2^213431320133 is an apocalyptic number.

It is an amenable number.

213431320133 is a deficient number, since it is larger than the sum of its proper divisors (1).

213431320133 is an equidigital number, since it uses as much as digits as its factorization.

213431320133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 213431320133 its reverse (331023134312), we get a palindrome (544454454445).

The spelling of 213431320133 in words is "two hundred thirteen billion, four hundred thirty-one million, three hundred twenty thousand, one hundred thirty-three".