2172528601 has 4 divisors (see below), whose sum is σ = 2188386612. Its totient is φ = 2156670592.

The previous prime is 2172528557. The next prime is 2172528607. The reversal of 2172528601 is 1068252712.

It is a happy number.

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 737937225 + 1434591376 = 27165^2 + 37876^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172528601 - 2²⁹ = 1635657689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172528607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7928800 + ... + 7929073.

It is an arithmetic number, because the mean of its divisors is an integer number (547096653).

Almost surely, 2^2172528601 is an apocalyptic number.

It is an amenable number.

2172528601 is a deficient number, since it is larger than the sum of its proper divisors (15858011).

2172528601 is a wasteful number, since it uses less digits than its factorization.

2172528601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15858010.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 2172528601 is about 46610.3915559610. The cubic root of 2172528601 is about 1295.1552615184.

The spelling of 2172528601 in words is "two billion, one hundred seventy-two million, five hundred twenty-eight thousand, six hundred one".