2175138145 has 32 divisors (see below), whose sum is σ = 2814105600. Its totient is φ = 1608797376.

The previous prime is 2175138137. The next prime is 2175138193. The reversal of 2175138145 is 5418315712.

It is a cyclic number.

It is not a de Polignac number, because 2175138145 - 2³ = 2175138137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2763442 + ... + 2764228.

It is an arithmetic number, because the mean of its divisors is an integer number (87940800).

Almost surely, 2^2175138145 is an apocalyptic number.

It is an amenable number.

2175138145 is a deficient number, since it is larger than the sum of its proper divisors (638967455).

2175138145 is a wasteful number, since it uses less digits than its factorization.

2175138145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477.

The product of its digits is 33600, while the sum is 37.

The square root of 2175138145 is about 46638.3763117886. The cubic root of 2175138145 is about 1295.6736148534.

The spelling of 2175138145 in words is "two billion, one hundred seventy-five million, one hundred thirty-eight thousand, one hundred forty-five".