204303522391 has 2 divisors, whose sum is σ = 204303522392. Its totient is φ = 204303522390.

The previous prime is 204303522323. The next prime is 204303522491. The reversal of 204303522391 is 193225303402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204303522391 - 2¹⁵ = 204303489623 is a prime.

It is a super-2 number, since 2×204303522391² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204303522491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102151761195 + 102151761196.

It is an arithmetic number, because the mean of its divisors is an integer number (102151761196).

Almost surely, 2^204303522391 is an apocalyptic number.

204303522391 is a deficient number, since it is larger than the sum of its proper divisors (1).

204303522391 is an equidigital number, since it uses as much as digits as its factorization.

204303522391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 204303522391 its reverse (193225303402), we get a palindrome (397528825793).

The spelling of 204303522391 in words is "two hundred four billion, three hundred three million, five hundred twenty-two thousand, three hundred ninety-one".