131321106609 has 64 divisors (see below), whose sum is σ = 239111792640. Its totient is φ = 61991838720.

The previous prime is 131321106607. The next prime is 131321106617. The reversal of 131321106609 is 906601123131.

It is not a de Polignac number, because 131321106609 - 2¹ = 131321106607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 131321106609.

It is not an unprimeable number, because it can be changed into a prime (131321106601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 462679 + ... + 690444.

It is an arithmetic number, because the mean of its divisors is an integer number (3736121760).

Almost surely, 2^131321106609 is an apocalyptic number.

It is an amenable number.

131321106609 is a deficient number, since it is larger than the sum of its proper divisors (107790686031).

131321106609 is a wasteful number, since it uses less digits than its factorization.

131321106609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153190.

The product of its (nonzero) digits is 5832, while the sum is 33.

The spelling of 131321106609 in words is "one hundred thirty-one billion, three hundred twenty-one million, one hundred six thousand, six hundred nine".