212325660 has 72 divisors (see below), whose sum is σ = 655003440. Its totient is φ = 55657728.

The previous prime is 212325653. The next prime is 212325671. The reversal of 212325660 is 66523212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 624 + ... + 20616.

It is an arithmetic number, because the mean of its divisors is an integer number (9097270).

Almost surely, 2^212325660 is an apocalyptic number.

212325660 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 212325660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327501720).

212325660 is an abundant number, since it is smaller than the sum of its proper divisors (442677780).

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

212325660 is a wasteful number, since it uses less digits than its factorization.

212325660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20067 (or 20062 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 212325660 is about 14571.3986974484. The cubic root of 212325660 is about 596.5783576986.

Adding to 212325660 its reverse (66523212), we get a palindrome (278848872).

The spelling of 212325660 in words is "two hundred twelve million, three hundred twenty-five thousand, six hundred sixty".