131022313 has 2 divisors, whose sum is σ = 131022314. Its totient is φ = 131022312.

The previous prime is 131022293. The next prime is 131022341. The reversal of 131022313 is 313220131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124277904 + 6744409 = 11148^2 + 2597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131022313 is a prime.

It is not a weakly prime, because it can be changed into another prime (131022343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65511156 + 65511157.

It is an arithmetic number, because the mean of its divisors is an integer number (65511157).

Almost surely, 2^131022313 is an apocalyptic number.

It is an amenable number.

131022313 is a deficient number, since it is larger than the sum of its proper divisors (1).

131022313 is an equidigital number, since it uses as much as digits as its factorization.

131022313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131022313 is about 11446.4978486872. The cubic root of 131022313 is about 507.9041413461.

Adding to 131022313 its reverse (313220131), we get a palindrome (444242444).

The spelling of 131022313 in words is "one hundred thirty-one million, twenty-two thousand, three hundred thirteen".