2131133220 has 96 divisors (see below), whose sum is σ = 6771340800. Its totient is φ = 556204032.

The previous prime is 2131133203. The next prime is 2131133261. The reversal of 2131133220 is 223311312.

2131133220 is a `hidden beast` number, since 2 + 1 + 311 + 332 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2131133193 and 2131133202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16605 + ... + 67364.

It is an arithmetic number, because the mean of its divisors is an integer number (70534800).

Almost surely, 2^2131133220 is an apocalyptic number.

2131133220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131133220 is an abundant number, since it is smaller than the sum of its proper divisors (4640207580).

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

2131133220 is a wasteful number, since it uses less digits than its factorization.

2131133220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84034 (or 84026 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2131133220 is about 46164.1984659108. The cubic root of 2131133220 is about 1286.8764884922.

Adding to 2131133220 its reverse (223311312), we get a palindrome (2354444532).

The spelling of 2131133220 in words is "two billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred twenty".