2172409533 has 12 divisors (see below), whose sum is σ = 3586199968. Its totient is φ = 1241376840.

The previous prime is 2172409523. The next prime is 2172409543. The reversal of 2172409533 is 3359042712.

2172409533 is a `hidden beast` number, since 217 + 2 + 409 + 5 + 33 = 666.

It is an interprime number because it is at equal distance from previous prime (2172409523) and next prime (2172409543).

It is not a de Polignac number, because 2172409533 - 2⁶ = 2172409469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172409523) 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 11 ways as a sum of consecutive naturals, for example, 17241283 + ... + 17241408.

Almost surely, 2^2172409533 is an apocalyptic number.

It is an amenable number.

2172409533 is a deficient number, since it is larger than the sum of its proper divisors (1413790435).

2172409533 is a wasteful number, since it uses less digits than its factorization.

2172409533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34482704 (or 34482701 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 2172409533 is about 46609.1142696361. The cubic root of 2172409533 is about 1295.1316002474.

The spelling of 2172409533 in words is "two billion, one hundred seventy-two million, four hundred nine thousand, five hundred thirty-three".