2161626223 has 2 divisors, whose sum is σ = 2161626224. Its totient is φ = 2161626222.

The previous prime is 2161626161. The next prime is 2161626239. The reversal of 2161626223 is 3226261612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161626223 - 2¹⁷ = 2161495151 is a prime.

It is a super-2 number, since 2×2161626223² = 9345255855922491458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161626323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080813111 + 1080813112.

It is an arithmetic number, because the mean of its divisors is an integer number (1080813112).

Almost surely, 2^2161626223 is an apocalyptic number.

2161626223 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161626223 is an equidigital number, since it uses as much as digits as its factorization.

2161626223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 2161626223 is about 46493.2922366227. The cubic root of 2161626223 is about 1292.9851392367.

Adding to 2161626223 its reverse (3226261612), we get a palindrome (5387887835).

The spelling of 2161626223 in words is "two billion, one hundred sixty-one million, six hundred twenty-six thousand, two hundred twenty-three".