133445543 has 16 divisors (see below), whose sum is σ = 168030720. Its totient is φ = 102948000.

The previous prime is 133445509. The next prime is 133445567. The reversal of 133445543 is 345544331.

It is a cyclic number.

It is not a de Polignac number, because 133445543 - 2²⁶ = 66336679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133445743) 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, 803 + ... + 16356.

It is an arithmetic number, because the mean of its divisors is an integer number (10501920).

Almost surely, 2^133445543 is an apocalyptic number.

133445543 is a deficient number, since it is larger than the sum of its proper divisors (34585177).

133445543 is a wasteful number, since it uses less digits than its factorization.

133445543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17278.

The product of its digits is 43200, while the sum is 32.

The square root of 133445543 is about 11551.8631830541. The cubic root of 133445543 is about 511.0162269552.

Adding to 133445543 its reverse (345544331), we get a palindrome (478989874).

The spelling of 133445543 in words is "one hundred thirty-three million, four hundred forty-five thousand, five hundred forty-three".