131643611 has 8 divisors (see below), whose sum is σ = 143990784. Its totient is φ = 119359720.

The previous prime is 131643607. The next prime is 131643613. The reversal of 131643611 is 116346131.

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 131643611 - 2² = 131643607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131643613) 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, 11411 + ... + 19836.

It is an arithmetic number, because the mean of its divisors is an integer number (17998848).

Almost surely, 2^131643611 is an apocalyptic number.

131643611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131643611 is a deficient number, since it is larger than the sum of its proper divisors (12347173).

131643611 is a wasteful number, since it uses less digits than its factorization.

131643611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31641.

The product of its digits is 1296, while the sum is 26.

The square root of 131643611 is about 11473.6049696684. The cubic root of 131643611 is about 508.7056901888.

Adding to 131643611 its reverse (116346131), we get a palindrome (247989742).

The spelling of 131643611 in words is "one hundred thirty-one million, six hundred forty-three thousand, six hundred eleven".