2241878861 has 2 divisors, whose sum is σ = 2241878862. Its totient is φ = 2241878860.

The previous prime is 2241878857. The next prime is 2241878867. The reversal of 2241878861 is 1688781422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1982475625 + 259403236 = 44525^2 + 16106^2 .

It is a cyclic number.

It is not a de Polignac number, because 2241878861 - 2² = 2241878857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2241878867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1120939430 + 1120939431.

It is an arithmetic number, because the mean of its divisors is an integer number (1120939431).

Almost surely, 2^2241878861 is an apocalyptic number.

It is an amenable number.

2241878861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2241878861 is an equidigital number, since it uses as much as digits as its factorization.

2241878861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 344064, while the sum is 47.

The square root of 2241878861 is about 47348.4831964024. The cubic root of 2241878861 is about 1308.7922479670.

The spelling of 2241878861 in words is "two billion, two hundred forty-one million, eight hundred seventy-eight thousand, eight hundred sixty-one".