215244211040 has 96 divisors (see below), whose sum is σ = 510524894880. Its totient is φ = 85757865984.

The previous prime is 215244211031. The next prime is 215244211067. The reversal of 215244211040 is 40112442512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79336724 + ... + 79339436.

It is an arithmetic number, because the mean of its divisors is an integer number (5317967655).

Almost surely, 2^215244211040 is an apocalyptic number.

215244211040 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 215244211040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255262447440).

215244211040 is an abundant number, since it is smaller than the sum of its proper divisors (295280683840).

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

215244211040 is a wasteful number, since it uses less digits than its factorization.

215244211040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504 (or 4496 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 215244211040 its reverse (40112442512), we get a palindrome (255356653552).

The spelling of 215244211040 in words is "two hundred fifteen billion, two hundred forty-four million, two hundred eleven thousand, forty".