2263855861 has 2 divisors, whose sum is σ = 2263855862. Its totient is φ = 2263855860.

The previous prime is 2263855823. The next prime is 2263855883. The reversal of 2263855861 is 1685583622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2252926225 + 10929636 = 47465^2 + 3306^2 .

It is a cyclic number.

It is not a de Polignac number, because 2263855861 - 2⁷ = 2263855733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2263853861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1131927930 + 1131927931.

It is an arithmetic number, because the mean of its divisors is an integer number (1131927931).

Almost surely, 2^2263855861 is an apocalyptic number.

It is an amenable number.

2263855861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2263855861 is an equidigital number, since it uses as much as digits as its factorization.

2263855861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 46.

The square root of 2263855861 is about 47579.9943358551. The cubic root of 2263855861 is about 1313.0550187921.

The spelling of 2263855861 in words is "two billion, two hundred sixty-three million, eight hundred fifty-five thousand, eight hundred sixty-one".