131331020 has 12 divisors (see below), whose sum is σ = 275795184. Its totient is φ = 52532400.

The previous prime is 131331017. The next prime is 131331023. The reversal of 131331020 is 20133131.

It is an interprime number because it is at equal distance from previous prime (131331017) and next prime (131331023).

It is a junction number, because it is equal to n+sod(n) for n = 131330986 and 131331004.

It is not an unprimeable number, because it can be changed into a prime (131331023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3283256 + ... + 3283295.

It is an arithmetic number, because the mean of its divisors is an integer number (22982932).

Almost surely, 2^131331020 is an apocalyptic number.

131331020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131331020 is an abundant number, since it is smaller than the sum of its proper divisors (144464164).

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

131331020 is a wasteful number, since it uses less digits than its factorization.

131331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566560 (or 6566558 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 131331020 is about 11459.9746945619. The cubic root of 131331020 is about 508.3027263366.

Adding to 131331020 its reverse (20133131), we get a palindrome (151464151).

The spelling of 131331020 in words is "one hundred thirty-one million, three hundred thirty-one thousand, twenty".