131033321 has 16 divisors (see below), whose sum is σ = 137050368. Its totient is φ = 125193600.

The previous prime is 131033267. The next prime is 131033327. The reversal of 131033321 is 123330131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131033321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131033321.

It is not an unprimeable number, because it can be changed into a prime (131033327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620906 + ... + 621116.

It is an arithmetic number, because the mean of its divisors is an integer number (8565648).

Almost surely, 2^131033321 is an apocalyptic number.

It is an amenable number.

131033321 is a deficient number, since it is larger than the sum of its proper divisors (6017047).

131033321 is a wasteful number, since it uses less digits than its factorization.

131033321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 131033321 is about 11446.9786843516. The cubic root of 131033321 is about 507.9183650105.

Adding to 131033321 its reverse (123330131), we get a palindrome (254363452).

The spelling of 131033321 in words is "one hundred thirty-one million, thirty-three thousand, three hundred twenty-one".