131405233 has 8 divisors (see below), whose sum is σ = 137366208. Its totient is φ = 125464944.

The previous prime is 131405227. The next prime is 131405251. The reversal of 131405233 is 332504131.

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 131405233 - 2⁵ = 131405201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131405933) 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, 8635 + ... + 18367.

It is an arithmetic number, because the mean of its divisors is an integer number (17170776).

Almost surely, 2^131405233 is an apocalyptic number.

It is an amenable number.

131405233 is a deficient number, since it is larger than the sum of its proper divisors (5960975).

131405233 is an equidigital number, since it uses as much as digits as its factorization.

131405233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 131405233 is about 11463.2121589021. The cubic root of 131405233 is about 508.3984528120.

Adding to 131405233 its reverse (332504131), we get a palindrome (463909364).

The spelling of 131405233 in words is "one hundred thirty-one million, four hundred five thousand, two hundred thirty-three".