215748441920 has 224 divisors, whose sum is σ = 599096445696. Its totient is φ = 73211494400.

The previous prime is 215748441917. The next prime is 215748441941. The reversal of 215748441920 is 29144847512.

It is a super-2 number, since 2×215748441920² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3286862 + ... + 3351858.

It is an arithmetic number, because the mean of its divisors is an integer number (2674537704).

Almost surely, 2^215748441920 is an apocalyptic number.

215748441920 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 215748441920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299548222848).

215748441920 is an abundant number, since it is smaller than the sum of its proper divisors (383348003776).

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

215748441920 is a wasteful number, since it uses less digits than its factorization.

215748441920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65089 (or 65079 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 215748441920 in words is "two hundred fifteen billion, seven hundred forty-eight million, four hundred forty-one thousand, nine hundred twenty".