131250109 has 2 divisors, whose sum is σ = 131250110. Its totient is φ = 131250108.

The previous prime is 131250089. The next prime is 131250113. The reversal of 131250109 is 901052131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121484484 + 9765625 = 11022^2 + 3125^2 .

It is a cyclic number.

It is not a de Polignac number, because 131250109 - 2¹³ = 131241917 is a prime.

It is a super-2 number, since 2×131250109² = 34453182225023762, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131250109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131250199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65625054 + 65625055.

It is an arithmetic number, because the mean of its divisors is an integer number (65625055).

Almost surely, 2^131250109 is an apocalyptic number.

It is an amenable number.

131250109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131250109 is an equidigital number, since it uses as much as digits as its factorization.

131250109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 131250109 is about 11456.4439945386. The cubic root of 131250109 is about 508.1983190896.

The spelling of 131250109 in words is "one hundred thirty-one million, two hundred fifty thousand, one hundred nine".