213404242193 has 2 divisors, whose sum is σ = 213404242194. Its totient is φ = 213404242192.

The previous prime is 213404242187. The next prime is 213404242213. The reversal of 213404242193 is 391242404312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176111997649 + 37292244544 = 419657^2 + 193112^2 .

It is a cyclic number.

It is not a de Polignac number, because 213404242193 - 2²⁰ = 213403193617 is a prime.

It is not a weakly prime, because it can be changed into another prime (213404245193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106702121096 + 106702121097.

It is an arithmetic number, because the mean of its divisors is an integer number (106702121097).

Almost surely, 2^213404242193 is an apocalyptic number.

It is an amenable number.

213404242193 is a deficient number, since it is larger than the sum of its proper divisors (1).

213404242193 is an equidigital number, since it uses as much as digits as its factorization.

213404242193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 213404242193 in words is "two hundred thirteen billion, four hundred four million, two hundred forty-two thousand, one hundred ninety-three".