2165772135 has 8 divisors (see below), whose sum is σ = 3465235440. Its totient is φ = 1155078464.

The previous prime is 2165772131. The next prime is 2165772149. The reversal of 2165772135 is 5312775612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2165772135 - 2² = 2165772131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2165772093 and 2165772102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165772131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72192390 + ... + 72192419.

It is an arithmetic number, because the mean of its divisors is an integer number (433154430).

Almost surely, 2^2165772135 is an apocalyptic number.

2165772135 is a deficient number, since it is larger than the sum of its proper divisors (1299463305).

2165772135 is a wasteful number, since it uses less digits than its factorization.

2165772135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144384817.

The product of its digits is 88200, while the sum is 39.

The square root of 2165772135 is about 46537.8570091060. The cubic root of 2165772135 is about 1293.8112424509.

The spelling of 2165772135 in words is "two billion, one hundred sixty-five million, seven hundred seventy-two thousand, one hundred thirty-five".