2156348165 has 8 divisors (see below), whose sum is σ = 2588235768. Its totient is φ = 1724666560.

The previous prime is 2156348149. The next prime is 2156348237. The reversal of 2156348165 is 5618436512.

It can be written as a sum of positive squares in 4 ways, for example, as 971818276 + 1184529889 = 31174^2 + 34417^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2156348165 - 2⁴ = 2156348149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27446 + ... + 71175.

It is an arithmetic number, because the mean of its divisors is an integer number (323529471).

Almost surely, 2^2156348165 is an apocalyptic number.

It is an amenable number.

2156348165 is a deficient number, since it is larger than the sum of its proper divisors (431887603).

2156348165 is an equidigital number, since it uses as much as digits as its factorization.

2156348165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102999.

The product of its digits is 172800, while the sum is 41.

The square root of 2156348165 is about 46436.4960456751. The cubic root of 2156348165 is about 1291.9319179060.

The spelling of 2156348165 in words is "two billion, one hundred fifty-six million, three hundred forty-eight thousand, one hundred sixty-five".