261082201 has 2 divisors, whose sum is σ = 261082202. Its totient is φ = 261082200.

The previous prime is 261082189. The next prime is 261082207. The reversal of 261082201 is 102280162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259177801 + 1904400 = 16099^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 261082201 - 2⁵ = 261082169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261082207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130541100 + 130541101.

It is an arithmetic number, because the mean of its divisors is an integer number (130541101).

Almost surely, 2^261082201 is an apocalyptic number.

It is an amenable number.

261082201 is a deficient number, since it is larger than the sum of its proper divisors (1).

261082201 is an equidigital number, since it uses as much as digits as its factorization.

261082201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 261082201 is about 16158.0382782069. The cubic root of 261082201 is about 639.1347364749.

The spelling of 261082201 in words is "two hundred sixty-one million, eighty-two thousand, two hundred one".