2151155250 has 96 divisors (see below), whose sum is σ = 5836040496. Its totient is φ = 571737600.

The previous prime is 2151155213. The next prime is 2151155257. The reversal of 2151155250 is 525511512.

2151155250 is a `hidden beast` number, since 21 + 5 + 115 + 525 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 121022001 + 2030133249 = 11001^2 + 45057^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151155257) 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, 756832 + ... + 759668.

Almost surely, 2^2151155250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151155250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2918020248).

2151155250 is an abundant number, since it is smaller than the sum of its proper divisors (3684885246).

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

2151155250 is a wasteful number, since it uses less digits than its factorization.

2151155250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197 (or 3184 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 2151155250 is about 46380.5481856349. The cubic root of 2151155250 is about 1290.8940080097.

Adding to 2151155250 its reverse (525511512), we get a palindrome (2676666762).

The spelling of 2151155250 in words is "two billion, one hundred fifty-one million, one hundred fifty-five thousand, two hundred fifty".