215451222210 has 192 divisors, whose sum is σ = 662926567680. Its totient is φ = 47500992000.

The previous prime is 215451222167. The next prime is 215451222223. The reversal of 215451222210 is 12222154512.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20511960 + ... + 20522460.

It is an arithmetic number, because the mean of its divisors is an integer number (3452742540).

Almost surely, 2^215451222210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215451222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331463283840).

215451222210 is an abundant number, since it is smaller than the sum of its proper divisors (447475345470).

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

215451222210 is a wasteful number, since it uses less digits than its factorization.

215451222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11673 (or 11670 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 215451222210 its reverse (12222154512), we get a palindrome (227673376722).

The spelling of 215451222210 in words is "two hundred fifteen billion, four hundred fifty-one million, two hundred twenty-two thousand, two hundred ten".