131566381031 has 2 divisors, whose sum is σ = 131566381032. Its totient is φ = 131566381030.

The previous prime is 131566381027. The next prime is 131566381057. The reversal of 131566381031 is 130183665131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131566381031 - 2² = 131566381027 is a prime.

It is a super-2 number, since 2×131566381031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131566381021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65783190515 + 65783190516.

It is an arithmetic number, because the mean of its divisors is an integer number (65783190516).

Almost surely, 2^131566381031 is an apocalyptic number.

131566381031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131566381031 is an equidigital number, since it uses as much as digits as its factorization.

131566381031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 131566381031 in words is "one hundred thirty-one billion, five hundred sixty-six million, three hundred eighty-one thousand, thirty-one".