131403220 has 48 divisors (see below), whose sum is σ = 299230848. Its totient is φ = 48182400.

The previous prime is 131403143. The next prime is 131403253. The reversal of 131403220 is 22304131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131403194 and 131403203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37587 + ... + 40933.

It is an arithmetic number, because the mean of its divisors is an integer number (6233976).

Almost surely, 2^131403220 is an apocalyptic number.

131403220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131403220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149615424).

131403220 is an abundant number, since it is smaller than the sum of its proper divisors (167827628).

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

131403220 is a wasteful number, since it uses less digits than its factorization.

131403220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131403220 is about 11463.1243559511. The cubic root of 131403220 is about 508.3958567426.

Adding to 131403220 its reverse (22304131), we get a palindrome (153707351).

The spelling of 131403220 in words is "one hundred thirty-one million, four hundred three thousand, two hundred twenty".