131043321 has 6 divisors (see below), whose sum is σ = 189284810. Its totient is φ = 87362208.

The previous prime is 131043301. The next prime is 131043337. The reversal of 131043321 is 123340131.

It can be written as a sum of positive squares in only one way, i.e., 98724096 + 32319225 = 9936^2 + 5685^2 .

It is not a de Polignac number, because 131043321 - 2¹³ = 131035129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131043294 and 131043303.

It is not an unprimeable number, because it can be changed into a prime (131043301) 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, 7280176 + ... + 7280193.

Almost surely, 2^131043321 is an apocalyptic number.

It is an amenable number.

131043321 is a deficient number, since it is larger than the sum of its proper divisors (58241489).

131043321 is a wasteful number, since it uses less digits than its factorization.

131043321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14560375 (or 14560372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 131043321 is about 11447.4154724986. The cubic root of 131043321 is about 507.9312855267.

Adding to 131043321 its reverse (123340131), we get a palindrome (254383452).

The spelling of 131043321 in words is "one hundred thirty-one million, forty-three thousand, three hundred twenty-one".