2161224599 has 2 divisors, whose sum is σ = 2161224600. Its totient is φ = 2161224598.

The previous prime is 2161224581. The next prime is 2161224629. The reversal of 2161224599 is 9954221612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2161224599 - 2⁸ = 2161224343 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161224539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080612299 + 1080612300.

It is an arithmetic number, because the mean of its divisors is an integer number (1080612300).

Almost surely, 2^2161224599 is an apocalyptic number.

2161224599 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161224599 is an equidigital number, since it uses as much as digits as its factorization.

2161224599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 2161224599 is about 46488.9728752959. The cubic root of 2161224599 is about 1292.9050566239.

The spelling of 2161224599 in words is "two billion, one hundred sixty-one million, two hundred twenty-four thousand, five hundred ninety-nine".