2173305537 has 12 divisors (see below), whose sum is σ = 3380697684. Its totient is φ = 1337418720.

The previous prime is 2173305503. The next prime is 2173305587. The reversal of 2173305537 is 7355033712.

2173305537 is a `hidden beast` number, since 2 + 1 + 73 + 30 + 553 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 277922241 + 1895383296 = 16671^2 + 43536^2 .

It is not a de Polignac number, because 2173305537 - 2²² = 2169111233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2173305587) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9287514 + ... + 9287747.

It is an arithmetic number, because the mean of its divisors is an integer number (281724807).

Almost surely, 2^2173305537 is an apocalyptic number.

It is an amenable number.

2173305537 is a deficient number, since it is larger than the sum of its proper divisors (1207392147).

2173305537 is a wasteful number, since it uses less digits than its factorization.

2173305537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18575280 (or 18575277 counting only the distinct ones).

The product of its (nonzero) digits is 66150, while the sum is 36.

The square root of 2173305537 is about 46618.7251756202. The cubic root of 2173305537 is about 1295.3096335284.

The spelling of 2173305537 in words is "two billion, one hundred seventy-three million, three hundred five thousand, five hundred thirty-seven".