131036420 has 12 divisors (see below), whose sum is σ = 275176524. Its totient is φ = 52414560.

The previous prime is 131036419. The next prime is 131036447. The reversal of 131036420 is 24630131.

It can be written as a sum of positive squares in 2 ways, for example, as 33895684 + 97140736 = 5822^2 + 9856^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6551821 = 131036420 / (1 + 3 + 1 + 0 + 3 + 6 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 131036392 and 131036401.

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, 3275891 + ... + 3275930.

It is an arithmetic number, because the mean of its divisors is an integer number (22931377).

Almost surely, 2^131036420 is an apocalyptic number.

131036420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131036420 is an abundant number, since it is smaller than the sum of its proper divisors (144140104).

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

131036420 is a wasteful number, since it uses less digits than its factorization.

131036420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6551830 (or 6551828 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 131036420 is about 11447.1140467805. The cubic root of 131036420 is about 507.9223691487.

Adding to 131036420 its reverse (24630131), we get a palindrome (155666551).

The spelling of 131036420 in words is "one hundred thirty-one million, thirty-six thousand, four hundred twenty".