131331311009 has 2 divisors, whose sum is σ = 131331311010. Its totient is φ = 131331311008.

The previous prime is 131331310969. The next prime is 131331311039. The reversal of 131331311009 is 900113133131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86055982609 + 45275328400 = 293353^2 + 212780^2 .

It is a cyclic number.

It is not a de Polignac number, because 131331311009 - 2¹² = 131331306913 is a prime.

It is not a weakly prime, because it can be changed into another prime (131331311039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65665655504 + 65665655505.

It is an arithmetic number, because the mean of its divisors is an integer number (65665655505).

Almost surely, 2^131331311009 is an apocalyptic number.

It is an amenable number.

131331311009 is a deficient number, since it is larger than the sum of its proper divisors (1).

131331311009 is an equidigital number, since it uses as much as digits as its factorization.

131331311009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 26.

The spelling of 131331311009 in words is "one hundred thirty-one billion, three hundred thirty-one million, three hundred eleven thousand, nine".