201043261 has 2 divisors, whose sum is σ = 201043262. Its totient is φ = 201043260.

The previous prime is 201043243. The next prime is 201043273. The reversal of 201043261 is 162340102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 80460900 = 10981^2 + 8970^2 .

It is a cyclic number.

It is not a de Polignac number, because 201043261 - 2¹¹ = 201041213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201043561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521630 + 100521631.

It is an arithmetic number, because the mean of its divisors is an integer number (100521631).

Almost surely, 2^201043261 is an apocalyptic number.

It is an amenable number.

201043261 is a deficient number, since it is larger than the sum of its proper divisors (1).

201043261 is an equidigital number, since it uses as much as digits as its factorization.

201043261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 201043261 is about 14178.9724945075. The cubic root of 201043261 is about 585.8186225929.

Adding to 201043261 its reverse (162340102), we get a palindrome (363383363).

The spelling of 201043261 in words is "two hundred one million, forty-three thousand, two hundred sixty-one".