2151254520 has 192 divisors, whose sum is σ = 7161897600. Its totient is φ = 559872000.

The previous prime is 2151254513. The next prime is 2151254533. The reversal of 2151254520 is 254521512.

2151254520 is a `hidden beast` number, since 2 + 15 + 125 + 4 + 520 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2864145 + ... + 2864895.

It is an arithmetic number, because the mean of its divisors is an integer number (37301550).

Almost surely, 2^2151254520 is an apocalyptic number.

2151254520 is a gapful number since it is divisible by the number (20) 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 2151254520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3580948800).

2151254520 is an abundant number, since it is smaller than the sum of its proper divisors (5010643080).

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

2151254520 is a wasteful number, since it uses less digits than its factorization.

2151254520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 2151254520 is about 46381.6183417526. The cubic root of 2151254520 is about 1290.9138647939.

The spelling of 2151254520 in words is "two billion, one hundred fifty-one million, two hundred fifty-four thousand, five hundred twenty".