2161342373 has 2 divisors, whose sum is σ = 2161342374. Its totient is φ = 2161342372.

The previous prime is 2161342369. The next prime is 2161342387. The reversal of 2161342373 is 3732431612.

2161342373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2153145604 + 8196769 = 46402^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161342373 - 2² = 2161342369 is a prime.

It is a super-2 number, since 2×2161342373² = 9342801706650542258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161342303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080671186 + 1080671187.

It is an arithmetic number, because the mean of its divisors is an integer number (1080671187).

Almost surely, 2^2161342373 is an apocalyptic number.

It is an amenable number.

2161342373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161342373 is an equidigital number, since it uses as much as digits as its factorization.

2161342373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 2161342373 is about 46490.2395455218. The cubic root of 2161342373 is about 1292.9285414319.

Adding to 2161342373 its reverse (3732431612), we get a palindrome (5893773985).

The spelling of 2161342373 in words is "two billion, one hundred sixty-one million, three hundred forty-two thousand, three hundred seventy-three".