131896161 has 8 divisors (see below), whose sum is σ = 195401760. Its totient is φ = 87930756.

The previous prime is 131896159. The next prime is 131896187. The reversal of 131896161 is 161698131.

It is a happy number.

131896161 is a `hidden beast` number, since 1 + 31 + 8 + 9 + 616 + 1 = 666.

It is not a de Polignac number, because 131896161 - 2¹ = 131896159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131896111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2442495 + ... + 2442548.

It is an arithmetic number, because the mean of its divisors is an integer number (24425220).

Almost surely, 2^131896161 is an apocalyptic number.

It is an amenable number.

131896161 is a deficient number, since it is larger than the sum of its proper divisors (63505599).

131896161 is an equidigital number, since it uses as much as digits as its factorization.

131896161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885052 (or 4885046 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 131896161 is about 11484.6053915666. The cubic root of 131896161 is about 509.0307890228.

It can be divided in two parts, 1318 and 96161, that added together give a palindrome (97479).

The spelling of 131896161 in words is "one hundred thirty-one million, eight hundred ninety-six thousand, one hundred sixty-one".