131243333 has 4 divisors (see below), whose sum is σ = 141338988. Its totient is φ = 121147680.

The previous prime is 131243297. The next prime is 131243347. The reversal of 131243333 is 333342131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 333342131 = 643 ⋅518417.

It can be written as a sum of positive squares in 2 ways, for example, as 6853924 + 124389409 = 2618^2 + 11153^2 .

It is a cyclic number.

It is not a de Polignac number, because 131243333 - 2¹⁸ = 130981189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131243299 and 131243308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131243933) 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, 5047808 + ... + 5047833.

It is an arithmetic number, because the mean of its divisors is an integer number (35334747).

Almost surely, 2^131243333 is an apocalyptic number.

131243333 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131243333 is a deficient number, since it is larger than the sum of its proper divisors (10095655).

131243333 is a wasteful number, since it uses less digits than its factorization.

131243333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095654.

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

The square root of 131243333 is about 11456.1482619596. The cubic root of 131243333 is about 508.1895734179.

Adding to 131243333 its reverse (333342131), we get a palindrome (464585464).

The spelling of 131243333 in words is "one hundred thirty-one million, two hundred forty-three thousand, three hundred thirty-three".