204213131597 has 2 divisors, whose sum is σ = 204213131598. Its totient is φ = 204213131596.

The previous prime is 204213131483. The next prime is 204213131657. The reversal of 204213131597 is 795131312402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173427270916 + 30785860681 = 416446^2 + 175459^2 .

It is a cyclic number.

It is not a de Polignac number, because 204213131597 - 2²⁰ = 204212083021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204213131597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204213139597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102106565798 + 102106565799.

It is an arithmetic number, because the mean of its divisors is an integer number (102106565799).

Almost surely, 2^204213131597 is an apocalyptic number.

It is an amenable number.

204213131597 is a deficient number, since it is larger than the sum of its proper divisors (1).

204213131597 is an equidigital number, since it uses as much as digits as its factorization.

204213131597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

Adding to 204213131597 its reverse (795131312402), we get a palindrome (999344443999).

The spelling of 204213131597 in words is "two hundred four billion, two hundred thirteen million, one hundred thirty-one thousand, five hundred ninety-seven".