213232665 has 16 divisors (see below), whose sum is σ = 350394048. Its totient is φ = 110650176.

The previous prime is 213232639. The next prime is 213232673. The reversal of 213232665 is 566232312.

213232665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213232665 - 2⁵ = 213232633 is a prime.

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, 191547 + ... + 192656.

It is an arithmetic number, because the mean of its divisors is an integer number (21899628).

Almost surely, 2^213232665 is an apocalyptic number.

It is an amenable number.

213232665 is a deficient number, since it is larger than the sum of its proper divisors (137161383).

213232665 is a wasteful number, since it uses less digits than its factorization.

213232665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384248.

The product of its digits is 12960, while the sum is 30.

The square root of 213232665 is about 14602.4883153523. The cubic root of 213232665 is about 597.4266315146.

Adding to 213232665 its reverse (566232312), we get a palindrome (779464977).

The spelling of 213232665 in words is "two hundred thirteen million, two hundred thirty-two thousand, six hundred sixty-five".