1665144230 has 32 divisors (see below), whose sum is σ = 3256796160. Its totient is φ = 610644960.

The previous prime is 1665144209. The next prime is 1665144253. The reversal of 1665144230 is 324415661.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135464 + ... + 147243.

It is an arithmetic number, because the mean of its divisors is an integer number (101774880).

Almost surely, 2^1665144230 is an apocalyptic number.

1665144230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665144230 is a deficient number, since it is larger than the sum of its proper divisors (1591651930).

1665144230 is a wasteful number, since it uses less digits than its factorization.

1665144230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282764.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1665144230 is about 40806.1788213501. The cubic root of 1665144230 is about 1185.2699818656.

Adding to 1665144230 its reverse (324415661), we get a palindrome (1989559891).

The spelling of 1665144230 in words is "one billion, six hundred sixty-five million, one hundred forty-four thousand, two hundred thirty".