212349660 has 96 divisors (see below), whose sum is σ = 625810752. Its totient is φ = 53729280.

The previous prime is 212349653. The next prime is 212349661. The reversal of 212349660 is 66943212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212349661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89854 + ... + 92186.

It is an arithmetic number, because the mean of its divisors is an integer number (6518862).

Almost surely, 2^212349660 is an apocalyptic number.

212349660 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 212349660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312905376).

212349660 is an abundant number, since it is smaller than the sum of its proper divisors (413461092).

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

212349660 is a wasteful number, since it uses less digits than its factorization.

212349660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 212349660 is about 14572.2222052781. Note that the first 4 decimals coincide. The cubic root of 212349660 is about 596.6008347136.

The spelling of 212349660 in words is "two hundred twelve million, three hundred forty-nine thousand, six hundred sixty".