2220065261 has 2 divisors, whose sum is σ = 2220065262. Its totient is φ = 2220065260.

The previous prime is 2220065227. The next prime is 2220065291. The reversal of 2220065261 is 1625600222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1787175625 + 432889636 = 42275^2 + 20806^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220065261 - 2¹⁰ = 2220064237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220065261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220065291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110032630 + 1110032631.

It is an arithmetic number, because the mean of its divisors is an integer number (1110032631).

Almost surely, 2^2220065261 is an apocalyptic number.

It is an amenable number.

2220065261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220065261 is an equidigital number, since it uses as much as digits as its factorization.

2220065261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2220065261 is about 47117.5684962626. The cubic root of 2220065261 is about 1304.5335328274.

Adding to 2220065261 its reverse (1625600222), we get a palindrome (3845665483).

The spelling of 2220065261 in words is "two billion, two hundred twenty million, sixty-five thousand, two hundred sixty-one".