131185433 has 4 divisors (see below), whose sum is σ = 131234148. Its totient is φ = 131136720.

The previous prime is 131185423. The next prime is 131185451. The reversal of 131185433 is 334581131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104693824 + 26491609 = 10232^2 + 5147^2 .

It is a cyclic number.

It is not a de Polignac number, because 131185433 - 2¹⁰ = 131184409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131185396 and 131185405.

It is not an unprimeable number, because it can be changed into a prime (131185423) 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, 20066 + ... + 25787.

It is an arithmetic number, because the mean of its divisors is an integer number (32808537).

Almost surely, 2^131185433 is an apocalyptic number.

It is an amenable number.

131185433 is a deficient number, since it is larger than the sum of its proper divisors (48715).

131185433 is an equidigital number, since it uses as much as digits as its factorization.

131185433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48714.

The product of its digits is 4320, while the sum is 29.

The square root of 131185433 is about 11453.6209558375. The cubic root of 131185433 is about 508.1148305626.

The spelling of 131185433 in words is "one hundred thirty-one million, one hundred eighty-five thousand, four hundred thirty-three".