2172064547 has 16 divisors (see below), whose sum is σ = 2322397440. Its totient is φ = 2026524192.

The previous prime is 2172064537. The next prime is 2172064549. The reversal of 2172064547 is 7454602712.

It is a cyclic number.

It is not a de Polignac number, because 2172064547 - 2²⁴ = 2155287331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172064547.

It is not an unprimeable number, because it can be changed into a prime (2172064549) 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, 1214588 + ... + 1216374.

It is an arithmetic number, because the mean of its divisors is an integer number (145149840).

Almost surely, 2^2172064547 is an apocalyptic number.

2172064547 is a deficient number, since it is larger than the sum of its proper divisors (150332893).

2172064547 is a wasteful number, since it uses less digits than its factorization.

2172064547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 2172064547 is about 46605.4132800043. The cubic root of 2172064547 is about 1295.0630395215.

The spelling of 2172064547 in words is "two billion, one hundred seventy-two million, sixty-four thousand, five hundred forty-seven".