2175239145 has 16 divisors (see below), whose sum is σ = 3631704192. Its totient is φ = 1109687040.

The previous prime is 2175239137. The next prime is 2175239153. The reversal of 2175239145 is 5419325712.

It is an interprime number because it is at equal distance from previous prime (2175239137) and next prime (2175239153).

It is not a de Polignac number, because 2175239145 - 2³ = 2175239137 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3152176 + ... + 3152865.

It is an arithmetic number, because the mean of its divisors is an integer number (226981512).

Almost surely, 2^2175239145 is an apocalyptic number.

It is an amenable number.

2175239145 is a deficient number, since it is larger than the sum of its proper divisors (1456465047).

2175239145 is a wasteful number, since it uses less digits than its factorization.

2175239145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305072.

The product of its digits is 75600, while the sum is 39.

The square root of 2175239145 is about 46639.4590984930. The cubic root of 2175239145 is about 1295.6936689068.

The spelling of 2175239145 in words is "two billion, one hundred seventy-five million, two hundred thirty-nine thousand, one hundred forty-five".