2173145275 has 24 divisors (see below), whose sum is σ = 3260818080. Its totient is φ = 1402498560.

The previous prime is 2173145267. The next prime is 2173145279. The reversal of 2173145275 is 5725413712.

It is not a de Polignac number, because 2173145275 - 2³ = 2173145267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2173145279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362260 + ... + 368209.

It is an arithmetic number, because the mean of its divisors is an integer number (135867420).

Almost surely, 2^2173145275 is an apocalyptic number.

2173145275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2173145275 is a deficient number, since it is larger than the sum of its proper divisors (1087672805).

2173145275 is a wasteful number, since it uses less digits than its factorization.

2173145275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730503 (or 730498 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 2173145275 is about 46617.0062852603. The cubic root of 2173145275 is about 1295.2777935483.

Adding to 2173145275 its reverse (5725413712), we get a palindrome (7898558987).

The spelling of 2173145275 in words is "two billion, one hundred seventy-three million, one hundred forty-five thousand, two hundred seventy-five".