133531452 has 36 divisors (see below), whose sum is σ = 338204776. Its totient is φ = 44422560.

The previous prime is 133531439. The next prime is 133531459. The reversal of 133531452 is 254135331.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133531459) 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, 16302 + ... + 23082.

Almost surely, 2^133531452 is an apocalyptic number.

133531452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133531452 is an abundant number, since it is smaller than the sum of its proper divisors (204673324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133531452 is a wasteful number, since it uses less digits than its factorization.

133531452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338 (or 7333 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 133531452 is about 11555.5809892882. The cubic root of 133531452 is about 511.1258633773.

Adding to 133531452 its reverse (254135331), we get a palindrome (387666783).

The spelling of 133531452 in words is "one hundred thirty-three million, five hundred thirty-one thousand, four hundred fifty-two".