1665233215 has 16 divisors (see below), whose sum is σ = 2188788480. Its totient is φ = 1210585600.

The previous prime is 1665233191. The next prime is 1665233237. The reversal of 1665233215 is 5123325661.

It is not a de Polignac number, because 1665233215 - 2¹⁷ = 1665102143 is a prime.

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, 335311 + ... + 340240.

It is an arithmetic number, because the mean of its divisors is an integer number (136799280).

Almost surely, 2^1665233215 is an apocalyptic number.

1665233215 is a deficient number, since it is larger than the sum of its proper divisors (523555265).

1665233215 is a wasteful number, since it uses less digits than its factorization.

1665233215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675602.

The product of its digits is 32400, while the sum is 34.

The square root of 1665233215 is about 40807.2691441121. The cubic root of 1665233215 is about 1185.2910950258.

Adding to 1665233215 its reverse (5123325661), we get a palindrome (6788558876).

The spelling of 1665233215 in words is "one billion, six hundred sixty-five million, two hundred thirty-three thousand, two hundred fifteen".