2151854208 has 384 divisors, whose sum is σ = 7520990400. Its totient is φ = 603832320.

The previous prime is 2151854161. The next prime is 2151854227. The reversal of 2151854208 is 8024581512.

2151854208 is a `hidden beast` number, since 2 + 151 + 85 + 420 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16426303 + ... + 16426433.

Almost surely, 2^2151854208 is an apocalyptic number.

2151854208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151854208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3760495200).

2151854208 is an abundant number, since it is smaller than the sum of its proper divisors (5369136192).

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

2151854208 is a wasteful number, since it uses less digits than its factorization.

2151854208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 2151854208 is about 46388.0826074974. The cubic root of 2151854208 is about 1291.0338062240.

The spelling of 2151854208 in words is "two billion, one hundred fifty-one million, eight hundred fifty-four thousand, two hundred eight".