1665230215 has 16 divisors (see below), whose sum is σ = 2188438560. Its totient is φ = 1206353920.

The previous prime is 1665230213. The next prime is 1665230221. The reversal of 1665230215 is 5120325661.

It is not a de Polignac number, because 1665230215 - 2¹ = 1665230213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665230213) 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, 44770 + ... + 73039.

It is an arithmetic number, because the mean of its divisors is an integer number (136777410).

Almost surely, 2^1665230215 is an apocalyptic number.

1665230215 is a deficient number, since it is larger than the sum of its proper divisors (523208345).

1665230215 is a wasteful number, since it uses less digits than its factorization.

1665230215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118082.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1665230215 is about 40807.2323859386. The cubic root of 1665230215 is about 1185.2903832385.

Adding to 1665230215 its reverse (5120325661), we get a palindrome (6785555876).

The spelling of 1665230215 in words is "one billion, six hundred sixty-five million, two hundred thirty thousand, two hundred fifteen".