2161319 has 2 divisors, whose sum is σ = 2161320. Its totient is φ = 2161318.

The previous prime is 2161303. The next prime is 2161331. The reversal of 2161319 is 9131612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161319 - 2⁴ = 2161303 is a prime.

It is a super-2 number, since 2×2161319² = 9342599639522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2161294 and 2161303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080659 + 1080660.

It is an arithmetic number, because the mean of its divisors is an integer number (1080660).

2^2161319 is an apocalyptic number.

2161319 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161319 is an equidigital number, since it uses as much as digits as its factorization.

2161319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 2161319 is about 1470.1425100989. The cubic root of 2161319 is about 129.2923880790.

The spelling of 2161319 in words is "two million, one hundred sixty-one thousand, three hundred nineteen".