131530220 has 12 divisors (see below), whose sum is σ = 276213504. Its totient is φ = 52612080.

The previous prime is 131530219. The next prime is 131530229. The reversal of 131530220 is 22035131.

It is not an unprimeable number, because it can be changed into a prime (131530229) 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, 3288236 + ... + 3288275.

It is an arithmetic number, because the mean of its divisors is an integer number (23017792).

Almost surely, 2^131530220 is an apocalyptic number.

131530220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131530220 is an abundant number, since it is smaller than the sum of its proper divisors (144683284).

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

131530220 is a wasteful number, since it uses less digits than its factorization.

131530220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6576520 (or 6576518 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 131530220 is about 11468.6625201023. The cubic root of 131530220 is about 508.5595906401.

Adding to 131530220 its reverse (22035131), we get a palindrome (153565351).

The spelling of 131530220 in words is "one hundred thirty-one million, five hundred thirty thousand, two hundred twenty".