203413261 has 2 divisors, whose sum is σ = 203413262. Its totient is φ = 203413260.

The previous prime is 203413247. The next prime is 203413267. The reversal of 203413261 is 162314302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167184900 + 36228361 = 12930^2 + 6019^2 .

It is a cyclic number.

It is not a de Polignac number, because 203413261 - 2¹¹ = 203411213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203413267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101706630 + 101706631.

It is an arithmetic number, because the mean of its divisors is an integer number (101706631).

Almost surely, 2^203413261 is an apocalyptic number.

It is an amenable number.

203413261 is a deficient number, since it is larger than the sum of its proper divisors (1).

203413261 is an equidigital number, since it uses as much as digits as its factorization.

203413261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 203413261 is about 14262.3020932807. The cubic root of 203413261 is about 588.1116115047. Note that the first 3 decimals are identical.

Adding to 203413261 its reverse (162314302), we get a palindrome (365727563).

The spelling of 203413261 in words is "two hundred three million, four hundred thirteen thousand, two hundred sixty-one".