133131441 has 8 divisors (see below), whose sum is σ = 178069824. Its totient is φ = 88473680.

The previous prime is 133131413. The next prime is 133131443. The reversal of 133131441 is 144131331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133131441 - 2⁶ = 133131377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133131443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69045 + ... + 70946.

It is an arithmetic number, because the mean of its divisors is an integer number (22258728).

Almost surely, 2^133131441 is an apocalyptic number.

It is an amenable number.

133131441 is a deficient number, since it is larger than the sum of its proper divisors (44938383).

133131441 is a wasteful number, since it uses less digits than its factorization.

133131441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140311.

The product of its digits is 432, while the sum is 21.

The square root of 133131441 is about 11538.2598774685. The cubic root of 133131441 is about 510.6149713406.

Adding to 133131441 its reverse (144131331), we get a palindrome (277262772).

The spelling of 133131441 in words is "one hundred thirty-three million, one hundred thirty-one thousand, four hundred forty-one".