213533532665 has 16 divisors (see below), whose sum is σ = 257458901760. Its totient is φ = 170015725440.

The previous prime is 213533532647. The next prime is 213533532679. The reversal of 213533532665 is 566235335312.

It is a happy number.

It is not a de Polignac number, because 213533532665 - 2¹⁴ = 213533516281 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, 1199981 + ... + 1366389.

It is an arithmetic number, because the mean of its divisors is an integer number (16091181360).

Almost surely, 2^213533532665 is an apocalyptic number.

It is an amenable number.

213533532665 is a deficient number, since it is larger than the sum of its proper divisors (43925369095).

213533532665 is a wasteful number, since it uses less digits than its factorization.

213533532665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167632.

The product of its digits is 1458000, while the sum is 44.

Adding to 213533532665 its reverse (566235335312), we get a palindrome (779768867977).

The spelling of 213533532665 in words is "two hundred thirteen billion, five hundred thirty-three million, five hundred thirty-two thousand, six hundred sixty-five".