213187900813 has 2 divisors, whose sum is σ = 213187900814. Its totient is φ = 213187900812.

The previous prime is 213187900811. The next prime is 213187900823. The reversal of 213187900813 is 318009781312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147281715529 + 65906185284 = 383773^2 + 256722^2 .

It is a cyclic number.

It is not a de Polignac number, because 213187900813 - 2¹ = 213187900811 is a prime.

Together with 213187900811, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 213187900813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213187900811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106593950406 + 106593950407.

It is an arithmetic number, because the mean of its divisors is an integer number (106593950407).

Almost surely, 2^213187900813 is an apocalyptic number.

It is an amenable number.

213187900813 is a deficient number, since it is larger than the sum of its proper divisors (1).

213187900813 is an equidigital number, since it uses as much as digits as its factorization.

213187900813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 213187900813 in words is "two hundred thirteen billion, one hundred eighty-seven million, nine hundred thousand, eight hundred thirteen".