213202312997 has 2 divisors, whose sum is σ = 213202312998. Its totient is φ = 213202312996.

The previous prime is 213202312987. The next prime is 213202313017. The reversal of 213202312997 is 799213202312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121292689441 + 91909623556 = 348271^2 + 303166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213202312997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213202312927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106601156498 + 106601156499.

It is an arithmetic number, because the mean of its divisors is an integer number (106601156499).

Almost surely, 2^213202312997 is an apocalyptic number.

It is an amenable number.

213202312997 is a deficient number, since it is larger than the sum of its proper divisors (1).

213202312997 is an equidigital number, since it uses as much as digits as its factorization.

213202312997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 213202312997 in words is "two hundred thirteen billion, two hundred two million, three hundred twelve thousand, nine hundred ninety-seven".