2185750090 has 32 divisors (see below), whose sum is σ = 3994247376. Its totient is φ = 861081600.

The previous prime is 2185750043. The next prime is 2185750093. The reversal of 2185750090 is 900575812.

It can be written as a sum of positive squares in 8 ways, for example, as 655923321 + 1529826769 = 25611^2 + 39113^2 .

It is not an unprimeable number, because it can be changed into a prime (2185750093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189324 + ... + 200536.

Almost surely, 2^2185750090 is an apocalyptic number.

2185750090 is a deficient number, since it is larger than the sum of its proper divisors (1808497286).

2185750090 is a wasteful number, since it uses less digits than its factorization.

2185750090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11514.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 2185750090 is about 46752.0062671111. The cubic root of 2185750090 is about 1297.7772846496. Note that the first 3 decimals are identical.

The spelling of 2185750090 in words is "two billion, one hundred eighty-five million, seven hundred fifty thousand, ninety".