2175472345 has 4 divisors (see below), whose sum is σ = 2610566820. Its totient is φ = 1740377872.

The previous prime is 2175472339. The next prime is 2175472349. The reversal of 2175472345 is 5432745712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 987153561 + 1188318784 = 31419^2 + 34472^2 .

It is a cyclic number.

It is not a de Polignac number, because 2175472345 - 2²⁵ = 2141917913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2175472298 and 2175472307.

It is not an unprimeable number, because it can be changed into a prime (2175472349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217547230 + ... + 217547239.

It is an arithmetic number, because the mean of its divisors is an integer number (652641705).

Almost surely, 2^2175472345 is an apocalyptic number.

It is an amenable number.

2175472345 is a deficient number, since it is larger than the sum of its proper divisors (435094475).

2175472345 is an equidigital number, since it uses as much as digits as its factorization.

2175472345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435094474.

The product of its digits is 235200, while the sum is 40.

The square root of 2175472345 is about 46641.9590604854. The cubic root of 2175472345 is about 1295.7399695580.

The spelling of 2175472345 in words is "two billion, one hundred seventy-five million, four hundred seventy-two thousand, three hundred forty-five".