2215905061 has 2 divisors, whose sum is σ = 2215905062. Its totient is φ = 2215905060.

The previous prime is 2215905011. The next prime is 2215905071. The reversal of 2215905061 is 1605095122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2071160100 + 144744961 = 45510^2 + 12031^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215905061 - 2¹⁹ = 2215380773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2215905011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107952530 + 1107952531.

It is an arithmetic number, because the mean of its divisors is an integer number (1107952531).

Almost surely, 2^2215905061 is an apocalyptic number.

It is an amenable number.

2215905061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215905061 is an equidigital number, since it uses as much as digits as its factorization.

2215905061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 2215905061 is about 47073.4007800584. The cubic root of 2215905061 is about 1303.7181643172.

The spelling of 2215905061 in words is "two billion, two hundred fifteen million, nine hundred five thousand, sixty-one".