2129450256 has 80 divisors (see below), whose sum is σ = 6150013120. Its totient is φ = 705438720.

The previous prime is 2129450221. The next prime is 2129450287. The reversal of 2129450256 is 6520549212.

2129450256 is a `hidden beast` number, since 2 + 12 + 94 + 502 + 56 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2129450256.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55296 + ... + 85536.

It is an arithmetic number, because the mean of its divisors is an integer number (76875164).

Almost surely, 2^2129450256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2129450256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3075006560).

2129450256 is an abundant number, since it is smaller than the sum of its proper divisors (4020562864).

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

2129450256 is a wasteful number, since it uses less digits than its factorization.

2129450256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30421 (or 30409 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 2129450256 is about 46145.9668443516. The cubic root of 2129450256 is about 1286.5376488650.

Adding to 2129450256 its reverse (6520549212), we get a palindrome (8649999468).

The spelling of 2129450256 in words is "two billion, one hundred twenty-nine million, four hundred fifty thousand, two hundred fifty-six".