2173245405 has 32 divisors (see below), whose sum is σ = 3732200064. Its totient is φ = 1075931136.

The previous prime is 2173245397. The next prime is 2173245419. The reversal of 2173245405 is 5045423712.

It is not a de Polignac number, because 2173245405 - 2³ = 2173245397 is a prime.

It is a super-2 number, since 2×2173245405² = 9445991180707228050, which contains 22 as substring.

It is a congruent number.

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, 39759 + ... + 76988.

It is an arithmetic number, because the mean of its divisors is an integer number (116631252).

Almost surely, 2^2173245405 is an apocalyptic number.

It is an amenable number.

2173245405 is a deficient number, since it is larger than the sum of its proper divisors (1558954659).

2173245405 is a wasteful number, since it uses less digits than its factorization.

2173245405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116845.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 2173245405 is about 46618.0802371784. The cubic root of 2173245405 is about 1295.2976870141.

The spelling of 2173245405 in words is "two billion, one hundred seventy-three million, two hundred forty-five thousand, four hundred five".