2165256250 has 24 divisors (see below), whose sum is σ = 4059607356. Its totient is φ = 866100000.

The previous prime is 2165256217. The next prime is 2165256251. The reversal of 2165256250 is 526525612.

It can be written as a sum of positive squares in 6 ways, for example, as 190964761 + 1974291489 = 13819^2 + 44433^2 .

It is not an unprimeable number, because it can be changed into a prime (2165256251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166971 + ... + 179470.

Almost surely, 2^2165256250 is an apocalyptic number.

2165256250 is a deficient number, since it is larger than the sum of its proper divisors (1894351106).

2165256250 is an frugal number, since it uses more digits than its factorization.

2165256250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346468 (or 346448 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 2165256250 is about 46532.3140408899. The cubic root of 2165256250 is about 1293.7085060634.

The spelling of 2165256250 in words is "two billion, one hundred sixty-five million, two hundred fifty-six thousand, two hundred fifty".