2185591069 has 2 divisors, whose sum is σ = 2185591070. Its totient is φ = 2185591068.

The previous prime is 2185591013. The next prime is 2185591091. The reversal of 2185591069 is 9601955812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2183225625 + 2365444 = 46725^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185591069 - 2¹⁹ = 2185066781 is a prime.

It is a super-2 number, since 2×2185591069² = 9553616641785125522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185591669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092795534 + 1092795535.

It is an arithmetic number, because the mean of its divisors is an integer number (1092795535).

Almost surely, 2^2185591069 is an apocalyptic number.

It is an amenable number.

2185591069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185591069 is an equidigital number, since it uses as much as digits as its factorization.

2185591069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 46.

The square root of 2185591069 is about 46750.3055498036. The cubic root of 2185591069 is about 1297.7458112670.

The spelling of 2185591069 in words is "two billion, one hundred eighty-five million, five hundred ninety-one thousand, sixty-nine".