131320312187 has 2 divisors, whose sum is σ = 131320312188. Its totient is φ = 131320312186.

The previous prime is 131320312171. The next prime is 131320312217. The reversal of 131320312187 is 781213023131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131320312187 - 2⁴ = 131320312171 is a prime.

It is a super-2 number, since 2×131320312187² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131320312157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660156093 + 65660156094.

It is an arithmetic number, because the mean of its divisors is an integer number (65660156094).

Almost surely, 2^131320312187 is an apocalyptic number.

131320312187 is a deficient number, since it is larger than the sum of its proper divisors (1).

131320312187 is an equidigital number, since it uses as much as digits as its factorization.

131320312187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 131320312187 in words is "one hundred thirty-one billion, three hundred twenty million, three hundred twelve thousand, one hundred eighty-seven".