2155250250 has 48 divisors (see below), whose sum is σ = 5827802760. Its totient is φ = 574732800.

The previous prime is 2155250219. The next prime is 2155250261. The reversal of 2155250250 is 520525512.

2155250250 is a `hidden beast` number, since 2 + 155 + 2 + 502 + 5 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 236021769 + 1919228481 = 15363^2 + 43809^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476695 + ... + 481194.

Almost surely, 2^2155250250 is an apocalyptic number.

2155250250 is an abundant number, since it is smaller than the sum of its proper divisors (3672552510).

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

2155250250 is a wasteful number, since it uses less digits than its factorization.

2155250250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957912 (or 957899 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 2155250250 is about 46424.6728582981. The cubic root of 2155250250 is about 1291.7126162403.

Adding to 2155250250 its reverse (520525512), we get a palindrome (2675775762).

It can be divided in two parts, 2155 and 250250, that added together give a triangular number (252405 = T₇₁₀).

The spelling of 2155250250 in words is "two billion, one hundred fifty-five million, two hundred fifty thousand, two hundred fifty".