131033220 has 48 divisors (see below), whose sum is σ = 367573248. Its totient is φ = 34877440.

The previous prime is 131033213. The next prime is 131033237. The reversal of 131033220 is 22330131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131033220.

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, 36757 + ... + 40163.

It is an arithmetic number, because the mean of its divisors is an integer number (7657776).

Almost surely, 2^131033220 is an apocalyptic number.

131033220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131033220 is an abundant number, since it is smaller than the sum of its proper divisors (236540028).

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

131033220 is a wasteful number, since it uses less digits than its factorization.

131033220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060 (or 4058 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 131033220 is about 11446.9742727063. The cubic root of 131033220 is about 507.9182345099.

Adding to 131033220 its reverse (22330131), we get a palindrome (153363351).

The spelling of 131033220 in words is "one hundred thirty-one million, thirty-three thousand, two hundred twenty".