131016321 has 12 divisors (see below), whose sum is σ = 189416448. Its totient is φ = 87265464.

The previous prime is 131016317. The next prime is 131016341. The reversal of 131016321 is 123610131.

131016321 is a `hidden beast` number, since 1 + 31 + 0 + 1 + 632 + 1 = 666.

It is not a de Polignac number, because 131016321 - 2² = 131016317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131016294 and 131016303.

It is not an unprimeable number, because it can be changed into a prime (131016341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5056 + ... + 16958.

It is an arithmetic number, because the mean of its divisors is an integer number (15784704).

Almost surely, 2^131016321 is an apocalyptic number.

It is an amenable number.

131016321 is a deficient number, since it is larger than the sum of its proper divisors (58400127).

131016321 is a wasteful number, since it uses less digits than its factorization.

131016321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13132 (or 13129 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 131016321 is about 11446.2361062491. The cubic root of 131016321 is about 507.8963986242.

Adding to 131016321 its reverse (123610131), we get a palindrome (254626452).

The spelling of 131016321 in words is "one hundred thirty-one million, sixteen thousand, three hundred twenty-one".