131021167 has 2 divisors, whose sum is σ = 131021168. Its totient is φ = 131021166.

The previous prime is 131021147. The next prime is 131021239. The reversal of 131021167 is 761120131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131021167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131021147) 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, 65510583 + 65510584.

It is an arithmetic number, because the mean of its divisors is an integer number (65510584).

Almost surely, 2^131021167 is an apocalyptic number.

131021167 is a deficient number, since it is larger than the sum of its proper divisors (1).

131021167 is an equidigital number, since it uses as much as digits as its factorization.

131021167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 131021167 is about 11446.4477895983. The cubic root of 131021167 is about 507.9026605300.

Adding to 131021167 its reverse (761120131), we get a palindrome (892141298).

The spelling of 131021167 in words is "one hundred thirty-one million, twenty-one thousand, one hundred sixty-seven".