131142529981 has 2 divisors, whose sum is σ = 131142529982. Its totient is φ = 131142529980.

The previous prime is 131142529963. The next prime is 131142530053. The reversal of 131142529981 is 189925241131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92714769081 + 38427760900 = 304491^2 + 196030^2 .

It is a cyclic number.

It is not a de Polignac number, because 131142529981 - 2⁷ = 131142529853 is a prime.

It is a super-2 number, since 2×131142529981² (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 (131142529951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65571264990 + 65571264991.

It is an arithmetic number, because the mean of its divisors is an integer number (65571264991).

Almost surely, 2^131142529981 is an apocalyptic number.

It is an amenable number.

131142529981 is a deficient number, since it is larger than the sum of its proper divisors (1).

131142529981 is an equidigital number, since it uses as much as digits as its factorization.

131142529981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 46.

The spelling of 131142529981 in words is "one hundred thirty-one billion, one hundred forty-two million, five hundred twenty-nine thousand, nine hundred eighty-one".