2103613261 has 2 divisors, whose sum is σ = 2103613262. Its totient is φ = 2103613260.

The previous prime is 2103613249. The next prime is 2103613319. The reversal of 2103613261 is 1623163012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1473101161 + 630512100 = 38381^2 + 25110^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103613261 - 2⁵ = 2103613229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103613361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051806630 + 1051806631.

It is an arithmetic number, because the mean of its divisors is an integer number (1051806631).

Almost surely, 2^2103613261 is an apocalyptic number.

It is an amenable number.

2103613261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103613261 is an equidigital number, since it uses as much as digits as its factorization.

2103613261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2103613261 is about 45865.1639155471. The cubic root of 2103613261 is about 1281.3131991955.

Adding to 2103613261 its reverse (1623163012), we get a palindrome (3726776273).

The spelling of 2103613261 in words is "two billion, one hundred three million, six hundred thirteen thousand, two hundred sixty-one".