131403404 has 24 divisors (see below), whose sum is σ = 265619088. Its totient is φ = 56215040.

The previous prime is 131403397. The next prime is 131403457. The reversal of 131403404 is 404304131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87089 + ... + 88584.

It is an arithmetic number, because the mean of its divisors is an integer number (11067462).

Almost surely, 2^131403404 is an apocalyptic number.

It is an amenable number.

131403404 is an abundant number, since it is smaller than the sum of its proper divisors (134215684).

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

131403404 is a wasteful number, since it uses less digits than its factorization.

131403404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175705 (or 175703 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 131403404 is about 11463.1323816835. The cubic root of 131403404 is about 508.3960940397.

Adding to 131403404 its reverse (404304131), we get a palindrome (535707535).

The spelling of 131403404 in words is "one hundred thirty-one million, four hundred three thousand, four hundred four".