131641161 has 4 divisors (see below), whose sum is σ = 175521552. Its totient is φ = 87760772.

The previous prime is 131641123. The next prime is 131641163. The reversal of 131641161 is 161146131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131641161 - 2¹⁰ = 131640137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131641163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21940191 + ... + 21940196.

It is an arithmetic number, because the mean of its divisors is an integer number (43880388).

Almost surely, 2^131641161 is an apocalyptic number.

It is an amenable number.

131641161 is a deficient number, since it is larger than the sum of its proper divisors (43880391).

131641161 is an equidigital number, since it uses as much as digits as its factorization.

131641161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43880390.

The product of its digits is 432, while the sum is 24.

The square root of 131641161 is about 11473.4982023793. The cubic root of 131641161 is about 508.7025343535.

Adding to 131641161 its reverse (161146131), we get a palindrome (292787292).

The spelling of 131641161 in words is "one hundred thirty-one million, six hundred forty-one thousand, one hundred sixty-one".