131143321 has 16 divisors (see below), whose sum is σ = 142502976. Its totient is φ = 120231936.

The previous prime is 131143291. The next prime is 131143333. The reversal of 131143321 is 123341131.

It is a cyclic number.

It is not a de Polignac number, because 131143321 - 2¹⁷ = 131012249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131143721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109890 + ... + 111076.

It is an arithmetic number, because the mean of its divisors is an integer number (8906436).

Almost surely, 2^131143321 is an apocalyptic number.

It is an amenable number.

131143321 is a deficient number, since it is larger than the sum of its proper divisors (11359655).

131143321 is a wasteful number, since it uses less digits than its factorization.

131143321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its digits is 216, while the sum is 19.

The square root of 131143321 is about 11451.7824376819. The cubic root of 131143321 is about 508.0604545512.

Adding to 131143321 its reverse (123341131), we get a palindrome (254484452).

The spelling of 131143321 in words is "one hundred thirty-one million, one hundred forty-three thousand, three hundred twenty-one".