2165466145 has 16 divisors (see below), whose sum is σ = 2648772432. Its totient is φ = 1699061760.

The previous prime is 2165466143. The next prime is 2165466179. The reversal of 2165466145 is 5416645612.

It can be written as a sum of positive squares in 8 ways, for example, as 872847936 + 1292618209 = 29544^2 + 35953^2 .

It is not a de Polignac number, because 2165466145 - 2¹ = 2165466143 is a prime.

It is a super-2 number, since 2×2165466145² = 9378487250282322050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165466098 and 2165466107.

It is not an unprimeable number, because it can be changed into a prime (2165466143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97609 + ... + 117721.

It is an arithmetic number, because the mean of its divisors is an integer number (165548277).

Almost surely, 2^2165466145 is an apocalyptic number.

It is an amenable number.

2165466145 is a deficient number, since it is larger than the sum of its proper divisors (483306287).

2165466145 is a wasteful number, since it uses less digits than its factorization.

2165466145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20532.

The product of its digits is 172800, while the sum is 40.

The square root of 2165466145 is about 46534.5693544058. The cubic root of 2165466145 is about 1293.7503077628.

The spelling of 2165466145 in words is "two billion, one hundred sixty-five million, four hundred sixty-six thousand, one hundred forty-five".