133545423 has 16 divisors (see below), whose sum is σ = 196592256. Its totient is φ = 79959840.

The previous prime is 133545413. The next prime is 133545437. The reversal of 133545423 is 324545331.

It is not a de Polignac number, because 133545423 - 2¹⁸ = 133283279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133545413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21640 + ... + 27117.

It is an arithmetic number, because the mean of its divisors is an integer number (12287016).

Almost surely, 2^133545423 is an apocalyptic number.

133545423 is a deficient number, since it is larger than the sum of its proper divisors (63046833).

133545423 is a wasteful number, since it uses less digits than its factorization.

133545423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48854.

The product of its digits is 21600, while the sum is 30.

The square root of 133545423 is about 11556.1854865695. The cubic root of 133545423 is about 511.1436886170.

The spelling of 133545423 in words is "one hundred thirty-three million, five hundred forty-five thousand, four hundred twenty-three".