131210320187 has 2 divisors, whose sum is σ = 131210320188. Its totient is φ = 131210320186.

The previous prime is 131210320169. The next prime is 131210320211. The reversal of 131210320187 is 781023012131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131210320187 is a prime.

It is a super-2 number, since 2×131210320187² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131210320387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605160093 + 65605160094.

It is an arithmetic number, because the mean of its divisors is an integer number (65605160094).

Almost surely, 2^131210320187 is an apocalyptic number.

131210320187 is a deficient number, since it is larger than the sum of its proper divisors (1).

131210320187 is an equidigital number, since it uses as much as digits as its factorization.

131210320187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 131210320187 in words is "one hundred thirty-one billion, two hundred ten million, three hundred twenty thousand, one hundred eighty-seven".