202143304261 has 2 divisors, whose sum is σ = 202143304262. Its totient is φ = 202143304260.

The previous prime is 202143304193. The next prime is 202143304309. The reversal of 202143304261 is 162403341202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187376436900 + 14766867361 = 432870^2 + 121519^2 .

It is a cyclic number.

It is not a de Polignac number, because 202143304261 - 2¹⁷ = 202143173189 is a prime.

It is a super-2 number, since 2×202143304261² (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 (202143304361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101071652130 + 101071652131.

It is an arithmetic number, because the mean of its divisors is an integer number (101071652131).

Almost surely, 2^202143304261 is an apocalyptic number.

It is an amenable number.

202143304261 is a deficient number, since it is larger than the sum of its proper divisors (1).

202143304261 is an equidigital number, since it uses as much as digits as its factorization.

202143304261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 202143304261 its reverse (162403341202), we get a palindrome (364546645463).

The spelling of 202143304261 in words is "two hundred two billion, one hundred forty-three million, three hundred four thousand, two hundred sixty-one".