500121216 has 192 divisors, whose sum is σ = 1706402880. Its totient is φ = 142829568.

The previous prime is 500121191. The next prime is 500121221. The reversal of 500121216 is 612121005.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216580 + ... + 218876.

It is an arithmetic number, because the mean of its divisors is an integer number (8887515).

Almost surely, 2^500121216 is an apocalyptic number.

500121216 is a gapful number since it is divisible by the number (56) 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 500121216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853201440).

500121216 is an abundant number, since it is smaller than the sum of its proper divisors (1206281664).

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

500121216 is an equidigital number, since it uses as much as digits as its factorization.

500121216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 500121216 is about 22363.3900829011. The cubic root of 500121216 is about 793.7646602703.

The spelling of 500121216 in words is "five hundred million, one hundred twenty-one thousand, two hundred sixteen".