200104361581 has 2 divisors, whose sum is σ = 200104361582. Its totient is φ = 200104361580.

The previous prime is 200104361573. The next prime is 200104361627. The reversal of 200104361581 is 185163401002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188239705956 + 11864655625 = 433866^2 + 108925^2 .

It is a cyclic number.

It is not a de Polignac number, because 200104361581 - 2³ = 200104361573 is a prime.

It is a super-2 number, since 2×200104361581² (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 (200104361081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100052180790 + 100052180791.

It is an arithmetic number, because the mean of its divisors is an integer number (100052180791).

Almost surely, 2^200104361581 is an apocalyptic number.

It is an amenable number.

200104361581 is a deficient number, since it is larger than the sum of its proper divisors (1).

200104361581 is an equidigital number, since it uses as much as digits as its factorization.

200104361581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 200104361581 its reverse (185163401002), we get a palindrome (385267762583).

The spelling of 200104361581 in words is "two hundred billion, one hundred four million, three hundred sixty-one thousand, five hundred eighty-one".