131665333 has 4 divisors (see below), whose sum is σ = 132045120. Its totient is φ = 131285548.

The previous prime is 131665327. The next prime is 131665361. The reversal of 131665333 is 333566131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 333566131 = 1289 ⋅258779.

It is a cyclic number.

It is not a de Polignac number, because 131665333 - 2⁵ = 131665301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131665295 and 131665304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131665433) 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, 189373 + ... + 190066.

It is an arithmetic number, because the mean of its divisors is an integer number (33011280).

Almost surely, 2^131665333 is an apocalyptic number.

It is an amenable number.

131665333 is a deficient number, since it is larger than the sum of its proper divisors (379787).

131665333 is an equidigital number, since it uses as much as digits as its factorization.

131665333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379786.

The product of its digits is 14580, while the sum is 31.

The square root of 131665333 is about 11474.5515380776. The cubic root of 131665333 is about 508.7336684988.

The spelling of 131665333 in words is "one hundred thirty-one million, six hundred sixty-five thousand, three hundred thirty-three".