213212616 has 32 divisors (see below), whose sum is σ = 538315200. Its totient is φ = 70366400.

The previous prime is 213212609. The next prime is 213212621. The reversal of 213212616 is 616212312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41556 + ... + 46403.

It is an arithmetic number, because the mean of its divisors is an integer number (16822350).

Almost surely, 2^213212616 is an apocalyptic number.

It is an amenable number.

213212616 is an abundant number, since it is smaller than the sum of its proper divisors (325102584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213212616 is a wasteful number, since it uses less digits than its factorization.

213212616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88069 (or 88065 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 213212616 is about 14601.8018066265. The cubic root of 213212616 is about 597.4079067694.

Adding to 213212616 its reverse (616212312), we get a palindrome (829424928).

The spelling of 213212616 in words is "two hundred thirteen million, two hundred twelve thousand, six hundred sixteen".