133433541 has 8 divisors (see below), whose sum is σ = 197679360. Its totient is φ = 88955676.

The previous prime is 133433537. The next prime is 133433563. The reversal of 133433541 is 145334331.

It is not a de Polignac number, because 133433541 - 2² = 133433537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4941983 = 133433541 / (1 + 3 + 3 + 4 + 3 + 3 + 5 + 4 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133433591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2470965 + ... + 2471018.

It is an arithmetic number, because the mean of its divisors is an integer number (24709920).

Almost surely, 2^133433541 is an apocalyptic number.

It is an amenable number.

133433541 is a deficient number, since it is larger than the sum of its proper divisors (64245819).

133433541 is an equidigital number, since it uses as much as digits as its factorization.

133433541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941992 (or 4941986 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 133433541 is about 11551.3436880737. The cubic root of 133433541 is about 511.0009063470. Note that the first 3 decimals are identical.

Adding to 133433541 its reverse (145334331), we get a palindrome (278767872).

The spelling of 133433541 in words is "one hundred thirty-three million, four hundred thirty-three thousand, five hundred forty-one".