2181403056 has 40 divisors (see below), whose sum is σ = 6440333824. Its totient is φ = 623257920.

The previous prime is 2181403039. The next prime is 2181403069. The reversal of 2181403056 is 6503041812.

It is a super-2 number, since 2×2181403056² = 9517038585452278272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3245800 + ... + 3246471.

Almost surely, 2^2181403056 is an apocalyptic number.

It is an amenable number.

2181403056 is an abundant number, since it is smaller than the sum of its proper divisors (4258930768).

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

2181403056 is a wasteful number, since it uses less digits than its factorization.

2181403056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492289 (or 6492283 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 2181403056 is about 46705.4927818988. The cubic root of 2181403056 is about 1296.9163710311.

Adding to 2181403056 its reverse (6503041812), we get a palindrome (8684444868).

The spelling of 2181403056 in words is "two billion, one hundred eighty-one million, four hundred three thousand, fifty-six".