204111351497 has 2 divisors, whose sum is σ = 204111351498. Its totient is φ = 204111351496.

The previous prime is 204111351491. The next prime is 204111351517. The reversal of 204111351497 is 794153111402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200198974096 + 3912377401 = 447436^2 + 62549^2 .

It is a cyclic number.

It is not a de Polignac number, because 204111351497 - 2¹⁸ = 204111089353 is a prime.

It is a super-2 number, since 2×204111351497² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204111351497.

It is not a weakly prime, because it can be changed into another prime (204111351491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102055675748 + 102055675749.

It is an arithmetic number, because the mean of its divisors is an integer number (102055675749).

Almost surely, 2^204111351497 is an apocalyptic number.

It is an amenable number.

204111351497 is a deficient number, since it is larger than the sum of its proper divisors (1).

204111351497 is an equidigital number, since it uses as much as digits as its factorization.

204111351497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

Adding to 204111351497 its reverse (794153111402), we get a palindrome (998264462899).

The spelling of 204111351497 in words is "two hundred four billion, one hundred eleven million, three hundred fifty-one thousand, four hundred ninety-seven".