133166541 has 4 divisors (see below), whose sum is σ = 177555392. Its totient is φ = 88777692.

The previous prime is 133166533. The next prime is 133166543. The reversal of 133166541 is 145661331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133166541 - 2³ = 133166533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133166499 and 133166508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133166543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22194421 + ... + 22194426.

It is an arithmetic number, because the mean of its divisors is an integer number (44388848).

Almost surely, 2^133166541 is an apocalyptic number.

It is an amenable number.

133166541 is a deficient number, since it is larger than the sum of its proper divisors (44388851).

133166541 is an equidigital number, since it uses as much as digits as its factorization.

133166541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44388850.

The product of its digits is 6480, while the sum is 30.

The square root of 133166541 is about 11539.7808038108. The cubic root of 133166541 is about 510.6598418098.

The spelling of 133166541 in words is "one hundred thirty-three million, one hundred sixty-six thousand, five hundred forty-one".