212987322 has 48 divisors (see below), whose sum is σ = 490554792. Its totient is φ = 66554880.

The previous prime is 212987311. The next prime is 212987351. The reversal of 212987322 is 223789212.

It can be written as a sum of positive squares in 4 ways, for example, as 207965241 + 5022081 = 14421^2 + 2241^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84748 + ... + 87224.

Almost surely, 2^212987322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212987322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245277396).

212987322 is an abundant number, since it is smaller than the sum of its proper divisors (277567470).

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

212987322 is a wasteful number, since it uses less digits than its factorization.

212987322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783 (or 2780 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 212987322 is about 14594.0851717400. The cubic root of 212987322 is about 597.1974128915.

The spelling of 212987322 in words is "two hundred twelve million, nine hundred eighty-seven thousand, three hundred twenty-two".