213243133429 has 2 divisors, whose sum is σ = 213243133430. Its totient is φ = 213243133428.

The previous prime is 213243133403. The next prime is 213243133451. The reversal of 213243133429 is 924331342312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193872896100 + 19370237329 = 440310^2 + 139177^2 .

It is a cyclic number.

It is not a de Polignac number, because 213243133429 - 2³¹ = 211095649781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213243133469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621566714 + 106621566715.

It is an arithmetic number, because the mean of its divisors is an integer number (106621566715).

Almost surely, 2^213243133429 is an apocalyptic number.

It is an amenable number.

213243133429 is a deficient number, since it is larger than the sum of its proper divisors (1).

213243133429 is an equidigital number, since it uses as much as digits as its factorization.

213243133429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 37.

The spelling of 213243133429 in words is "two hundred thirteen billion, two hundred forty-three million, one hundred thirty-three thousand, four hundred twenty-nine".