212210320 has 80 divisors (see below), whose sum is σ = 597068928. Its totient is φ = 68474880.

The previous prime is 212210309. The next prime is 212210329. The reversal of 212210320 is 23012212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 212210320.

It is not an unprimeable number, because it can be changed into a prime (212210329) 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, 1626 + ... + 20665.

Almost surely, 2^212210320 is an apocalyptic number.

212210320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212210320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298534464).

212210320 is an abundant number, since it is smaller than the sum of its proper divisors (384858608).

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

212210320 is a wasteful number, since it uses less digits than its factorization.

212210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22328 (or 22322 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212210320 is about 14567.4404066054. The cubic root of 212210320 is about 596.4703132742.

Adding to 212210320 its reverse (23012212), we get a palindrome (235222532).

The spelling of 212210320 in words is "two hundred twelve million, two hundred ten thousand, three hundred twenty".