131003604 has 36 divisors (see below), whose sum is σ = 332133984. Its totient is φ = 43537872.

The previous prime is 131003603. The next prime is 131003611. The reversal of 131003604 is 406300131.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131003603) 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 11 ways as a sum of consecutive naturals, for example, 7249 + ... + 17735.

It is an arithmetic number, because the mean of its divisors is an integer number (9225944).

Almost surely, 2^131003604 is an apocalyptic number.

It is an amenable number.

131003604 is an abundant number, since it is smaller than the sum of its proper divisors (201130380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131003604 is a wasteful number, since it uses less digits than its factorization.

131003604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10844 (or 10839 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 131003604 is about 11445.6805826478. The cubic root of 131003604 is about 507.8799652327.

Adding to 131003604 its reverse (406300131), we get a palindrome (537303735).

The spelling of 131003604 in words is "one hundred thirty-one million, three thousand, six hundred four".