133503432 has 16 divisors (see below), whose sum is σ = 333758640. Its totient is φ = 44501136.

The previous prime is 133503427. The next prime is 133503439. The reversal of 133503432 is 234305331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 5562643 = 133503432 / (1 + 3 + 3 + 5 + 0 + 3 + 4 + 3 + 2).

It is not an unprimeable number, because it can be changed into a prime (133503439) 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, 2781298 + ... + 2781345.

It is an arithmetic number, because the mean of its divisors is an integer number (20859915).

Almost surely, 2^133503432 is an apocalyptic number.

133503432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133503432 is an abundant number, since it is smaller than the sum of its proper divisors (200255208).

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

133503432 is a wasteful number, since it uses less digits than its factorization.

133503432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562652 (or 5562648 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 133503432 is about 11554.3685245019. The cubic root of 133503432 is about 511.0901096321.

Adding to 133503432 its reverse (234305331), we get a palindrome (367808763).

The spelling of 133503432 in words is "one hundred thirty-three million, five hundred three thousand, four hundred thirty-two".