131512742209 has 2 divisors, whose sum is σ = 131512742210. Its totient is φ = 131512742208.

The previous prime is 131512742189. The next prime is 131512742369. The reversal of 131512742209 is 902247215131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131149001025 + 363741184 = 362145^2 + 19072^2 .

It is an emirp because it is prime and its reverse (902247215131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131512742209 - 2⁵ = 131512742177 is a prime.

It is not a weakly prime, because it can be changed into another prime (131512242209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65756371104 + 65756371105.

It is an arithmetic number, because the mean of its divisors is an integer number (65756371105).

Almost surely, 2^131512742209 is an apocalyptic number.

It is an amenable number.

131512742209 is a deficient number, since it is larger than the sum of its proper divisors (1).

131512742209 is an equidigital number, since it uses as much as digits as its factorization.

131512742209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 131512742209 in words is "one hundred thirty-one billion, five hundred twelve million, seven hundred forty-two thousand, two hundred nine".