131322404 has 12 divisors (see below), whose sum is σ = 229897500. Its totient is φ = 65637408.

The previous prime is 131322379. The next prime is 131322421. The reversal of 131322404 is 404223131.

It can be written as a sum of positive squares in 2 ways, for example, as 48330304 + 82992100 = 6952^2 + 9110^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13622 + ... + 21170.

It is an arithmetic number, because the mean of its divisors is an integer number (19158125).

Almost surely, 2^131322404 is an apocalyptic number.

It is an amenable number.

131322404 is a deficient number, since it is larger than the sum of its proper divisors (98575096).

131322404 is a wasteful number, since it uses less digits than its factorization.

131322404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11902 (or 11900 counting only the distinct ones).

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

The square root of 131322404 is about 11459.5987713358. The cubic root of 131322404 is about 508.2916103233.

Adding to 131322404 its reverse (404223131), we get a palindrome (535545535).

The spelling of 131322404 in words is "one hundred thirty-one million, three hundred twenty-two thousand, four hundred four".