2172643133 has 6 divisors (see below), whose sum is σ = 2188636506. Its totient is φ = 2156765792.

The previous prime is 2172643127. The next prime is 2172643159. The reversal of 2172643133 is 3313462712.

It can be written as a sum of positive squares in 3 ways, for example, as 459759364 + 1712883769 = 21442^2 + 41387^2 .

It is not a de Polignac number, because 2172643133 - 2⁴ = 2172643117 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 2172643133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172643183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39110 + ... + 76647.

It is an arithmetic number, because the mean of its divisors is an integer number (364772751).

Almost surely, 2^2172643133 is an apocalyptic number.

It is an amenable number.

2172643133 is a deficient number, since it is larger than the sum of its proper divisors (15993373).

2172643133 is an equidigital number, since it uses as much as digits as its factorization.

2172643133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116031 (or 115894 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 2172643133 is about 46611.6201499154. The cubic root of 2172643133 is about 1295.1780205768.

The spelling of 2172643133 in words is "two billion, one hundred seventy-two million, six hundred forty-three thousand, one hundred thirty-three".