131285333 has 4 divisors (see below), whose sum is σ = 132867168. Its totient is φ = 129703500.

The previous prime is 131285309. The next prime is 131285347. The reversal of 131285333 is 333582131.

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: 333582131 = 331 ⋅1007801.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131285333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131285296 and 131285305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131285353) 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, 790793 + ... + 790958.

It is an arithmetic number, because the mean of its divisors is an integer number (33216792).

Almost surely, 2^131285333 is an apocalyptic number.

It is an amenable number.

131285333 is a deficient number, since it is larger than the sum of its proper divisors (1581835).

131285333 is an equidigital number, since it uses as much as digits as its factorization.

131285333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581834.

The product of its digits is 6480, while the sum is 29.

The square root of 131285333 is about 11457.9811921647. The cubic root of 131285333 is about 508.2437772777.

The spelling of 131285333 in words is "one hundred thirty-one million, two hundred eighty-five thousand, three hundred thirty-three".