2116415421 has 24 divisors (see below), whose sum is σ = 3088427264. Its totient is φ = 1396530720.

The previous prime is 2116415401. The next prime is 2116415437. The reversal of 2116415421 is 1245146112.

2116415421 is a `hidden beast` number, since 2 + 11 + 641 + 5 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 2116415421 - 2¹¹ = 2116413373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116415401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380160 + ... + 385686.

Almost surely, 2^2116415421 is an apocalyptic number.

It is an amenable number.

2116415421 is a deficient number, since it is larger than the sum of its proper divisors (972011843).

2116415421 is a wasteful number, since it uses less digits than its factorization.

2116415421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961 (or 5958 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2116415421 is about 46004.5152240516. The cubic root of 2116415421 is about 1283.9072140859.

It can be divided in two parts, 21164 and 15421, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 2116415421 in words is "two billion, one hundred sixteen million, four hundred fifteen thousand, four hundred twenty-one".