2145541019 has 2 divisors, whose sum is σ = 2145541020. Its totient is φ = 2145541018.

The previous prime is 2145541003. The next prime is 2145541043. The reversal of 2145541019 is 9101455412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145541019 - 2⁴ = 2145541003 is a prime.

It is a super-2 number, since 2×2145541019² = 9206692528423116722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2145541819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072770509 + 1072770510.

It is an arithmetic number, because the mean of its divisors is an integer number (1072770510).

Almost surely, 2^2145541019 is an apocalyptic number.

2145541019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145541019 is an equidigital number, since it uses as much as digits as its factorization.

2145541019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 2145541019 is about 46319.9850928301. The cubic root of 2145541019 is about 1289.7700086743.

The spelling of 2145541019 in words is "two billion, one hundred forty-five million, five hundred forty-one thousand, nineteen".