2131043100 has 36 divisors (see below), whose sum is σ = 6165818904. Its totient is φ = 568278080.

The previous prime is 2131043099. The next prime is 2131043129. The reversal of 2131043100 is 13401312.

It is a super-2 number, since 2×2131043100² = 9082689388115220000, which contains 22 as substring.

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 2131043100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3551439 + ... + 3552038.

Almost surely, 2^2131043100 is an apocalyptic number.

2131043100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131043100 is an abundant number, since it is smaller than the sum of its proper divisors (4034775804).

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

2131043100 is a wasteful number, since it uses less digits than its factorization.

2131043100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103494 (or 7103487 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2131043100 is about 46163.2223745267. Note that the first 3 decimals coincide. The cubic root of 2131043100 is about 1286.8583486996.

Adding to 2131043100 its reverse (13401312), we get a palindrome (2144444412).

The spelling of 2131043100 in words is "two billion, one hundred thirty-one million, forty-three thousand, one hundred".