213131033369 has 2 divisors, whose sum is σ = 213131033370. Its totient is φ = 213131033368.

The previous prime is 213131033321. The next prime is 213131033377. The reversal of 213131033369 is 963330131312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213040402969 + 90630400 = 461563^2 + 9520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213131033369 is a prime.

It is a super-2 number, since 2×213131033369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213131033309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565516684 + 106565516685.

It is an arithmetic number, because the mean of its divisors is an integer number (106565516685).

Almost surely, 2^213131033369 is an apocalyptic number.

It is an amenable number.

213131033369 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131033369 is an equidigital number, since it uses as much as digits as its factorization.

213131033369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 35.

The spelling of 213131033369 in words is "two hundred thirteen billion, one hundred thirty-one million, thirty-three thousand, three hundred sixty-nine".