172811133 has 24 divisors (see below), whose sum is σ = 274004640. Its totient is φ = 104081760.

The previous prime is 172811131. The next prime is 172811141. The reversal of 172811133 is 331118271.

It is a happy number.

It is not a de Polignac number, because 172811133 - 2¹ = 172811131 is a prime.

It is a super-3 number, since 3×172811133³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172811097 and 172811106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172811131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10783 + ... + 21491.

It is an arithmetic number, because the mean of its divisors is an integer number (11416860).

Almost surely, 2^172811133 is an apocalyptic number.

It is an amenable number.

172811133 is a deficient number, since it is larger than the sum of its proper divisors (101193507).

172811133 is a wasteful number, since it uses less digits than its factorization.

172811133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10889 (or 10886 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 172811133 is about 13145.7648313059. The cubic root of 172811133 is about 557.0026215379.

The spelling of 172811133 in words is "one hundred seventy-two million, eight hundred eleven thousand, one hundred thirty-three".