131531104 has 12 divisors (see below), whose sum is σ = 258951924. Its totient is φ = 65765536.

The previous prime is 131531093. The next prime is 131531143. The reversal of 131531104 is 401135131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2055142 + ... + 2055205.

It is an arithmetic number, because the mean of its divisors is an integer number (21579327).

Almost surely, 2^131531104 is an apocalyptic number.

It is an amenable number.

131531104 is a deficient number, since it is larger than the sum of its proper divisors (127420820).

131531104 is an equidigital number, since it uses as much as digits as its factorization.

131531104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110357 (or 4110349 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 131531104 is about 11468.7010598411. The cubic root of 131531104 is about 508.5607299617.

Adding to 131531104 its reverse (401135131), we get a palindrome (532666235).

The spelling of 131531104 in words is "one hundred thirty-one million, five hundred thirty-one thousand, one hundred four".