131022409 has 8 divisors (see below), whose sum is σ = 149865408. Its totient is φ = 112210800.

The previous prime is 131022407. The next prime is 131022427. The reversal of 131022409 is 904220131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131022409 - 2¹ = 131022407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131022409.

It is not an unprimeable number, because it can be changed into a prime (131022403) 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 7 ways as a sum of consecutive naturals, for example, 1914 + ... + 16300.

It is an arithmetic number, because the mean of its divisors is an integer number (18733176).

Almost surely, 2^131022409 is an apocalyptic number.

It is an amenable number.

131022409 is a deficient number, since it is larger than the sum of its proper divisors (18842999).

131022409 is a wasteful number, since it uses less digits than its factorization.

131022409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15695.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 131022409 is about 11446.5020421088. The cubic root of 131022409 is about 507.9042653931.

The spelling of 131022409 in words is "one hundred thirty-one million, twenty-two thousand, four hundred nine".