2215795261 has 2 divisors, whose sum is σ = 2215795262. Its totient is φ = 2215795260.

The previous prime is 2215795259. The next prime is 2215795313. The reversal of 2215795261 is 1625975122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1681492036 + 534303225 = 41006^2 + 23115^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215795261 - 2¹ = 2215795259 is a prime.

Together with 2215795259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2215795201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107897630 + 1107897631.

It is an arithmetic number, because the mean of its divisors is an integer number (1107897631).

Almost surely, 2^2215795261 is an apocalyptic number.

It is an amenable number.

2215795261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215795261 is an equidigital number, since it uses as much as digits as its factorization.

2215795261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The square root of 2215795261 is about 47072.2345018802. The cubic root of 2215795261 is about 1303.6966305098.

The spelling of 2215795261 in words is "two billion, two hundred fifteen million, seven hundred ninety-five thousand, two hundred sixty-one".