2123828217 has 48 divisors (see below), whose sum is σ = 3593116800. Its totient is φ = 1208340000.

The previous prime is 2123828191. The next prime is 2123828221. The reversal of 2123828217 is 7128283212.

It is not a de Polignac number, because 2123828217 - 2¹⁰ = 2123827193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123828237) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 773467 + ... + 776207.

It is an arithmetic number, because the mean of its divisors is an integer number (74856600).

Almost surely, 2^2123828217 is an apocalyptic number.

It is an amenable number.

2123828217 is a deficient number, since it is larger than the sum of its proper divisors (1469288583).

2123828217 is a wasteful number, since it uses less digits than its factorization.

2123828217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019 (or 3002 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2123828217 is about 46085.0107627198. The cubic root of 2123828217 is about 1285.4044394044.

It can be divided in two parts, 21238 and 28217, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 2123828217 in words is "two billion, one hundred twenty-three million, eight hundred twenty-eight thousand, two hundred seventeen".