131333243 has 6 divisors (see below), whose sum is σ = 137292204. Its totient is φ = 125622596.

The previous prime is 131333231. The next prime is 131333249. The reversal of 131333243 is 342333131.

It is not a de Polignac number, because 131333243 - 2⁴ = 131333227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131333249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123605 + ... + 124662.

It is an arithmetic number, because the mean of its divisors is an integer number (22882034).

Almost surely, 2^131333243 is an apocalyptic number.

131333243 is a deficient number, since it is larger than the sum of its proper divisors (5958961).

131333243 is an equidigital number, since it uses as much as digits as its factorization.

131333243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248313 (or 248290 counting only the distinct ones).

The product of its digits is 1944, while the sum is 23.

The square root of 131333243 is about 11460.0716838945. The cubic root of 131333243 is about 508.3055942820.

Adding to 131333243 its reverse (342333131), we get a palindrome (473666374).

The spelling of 131333243 in words is "one hundred thirty-one million, three hundred thirty-three thousand, two hundred forty-three".