2172601605 has 8 divisors (see below), whose sum is σ = 3476162592. Its totient is φ = 1158720848.

The previous prime is 2172601601. The next prime is 2172601657. The reversal of 2172601605 is 5061062712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172601605 - 2² = 2172601601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172601601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72420039 + ... + 72420068.

It is an arithmetic number, because the mean of its divisors is an integer number (434520324).

Almost surely, 2^2172601605 is an apocalyptic number.

It is an amenable number.

2172601605 is a deficient number, since it is larger than the sum of its proper divisors (1303560987).

2172601605 is a wasteful number, since it uses less digits than its factorization.

2172601605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144840115.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 2172601605 is about 46611.1746794693. The cubic root of 2172601605 is about 1295.1697684937.

The spelling of 2172601605 in words is "two billion, one hundred seventy-two million, six hundred one thousand, six hundred five".