131003904 has 160 divisors (see below), whose sum is σ = 384484320. Its totient is φ = 39452672.

The previous prime is 131003903. The next prime is 131003909. The reversal of 131003904 is 409300131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131003903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757162 + ... + 757334.

It is an arithmetic number, because the mean of its divisors is an integer number (2403027).

Almost surely, 2^131003904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131003904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192242160).

131003904 is an abundant number, since it is smaller than the sum of its proper divisors (253480416).

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

131003904 is a wasteful number, since it uses less digits than its factorization.

131003904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 131003904 is about 11445.6936880208. The cubic root of 131003904 is about 507.8803529163.

The spelling of 131003904 in words is "one hundred thirty-one million, three thousand, nine hundred four".