2172605530 has 32 divisors (see below), whose sum is σ = 4175639424. Its totient is φ = 811922496.

The previous prime is 2172605527. The next prime is 2172605531. The reversal of 2172605530 is 355062712.

2172605530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2172605492 and 2172605501.

It is not an unprimeable number, because it can be changed into a prime (2172605531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99949 + ... + 119728.

It is an arithmetic number, because the mean of its divisors is an integer number (130488732).

Almost surely, 2^2172605530 is an apocalyptic number.

2172605530 is a deficient number, since it is larger than the sum of its proper divisors (2003033894).

2172605530 is a wasteful number, since it uses less digits than its factorization.

2172605530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219750.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2172605530 is about 46611.2167830877. The cubic root of 2172605530 is about 1295.1705484400.

The spelling of 2172605530 in words is "two billion, one hundred seventy-two million, six hundred five thousand, five hundred thirty".