133431241 has 4 divisors (see below), whose sum is σ = 133460992. Its totient is φ = 133401492.

The previous prime is 133431239. The next prime is 133431271. The reversal of 133431241 is 142134331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133431241 - 2¹ = 133431239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133431271) 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, 6621 + ... + 17626.

It is an arithmetic number, because the mean of its divisors is an integer number (33365248).

Almost surely, 2^133431241 is an apocalyptic number.

It is an amenable number.

133431241 is a deficient number, since it is larger than the sum of its proper divisors (29751).

133431241 is an equidigital number, since it uses as much as digits as its factorization.

133431241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29750.

The product of its digits is 864, while the sum is 22.

The square root of 133431241 is about 11551.2441321271. The cubic root of 133431241 is about 510.9979702816.

Adding to 133431241 its reverse (142134331), we get a palindrome (275565572).

The spelling of 133431241 in words is "one hundred thirty-three million, four hundred thirty-one thousand, two hundred forty-one".