216015620 has 48 divisors (see below), whose sum is σ = 468151488. Its totient is φ = 83664000.

The previous prime is 216015601. The next prime is 216015637. The reversal of 216015620 is 26510612.

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, 185159 + ... + 186321.

It is an arithmetic number, because the mean of its divisors is an integer number (9753156).

Almost surely, 2^216015620 is an apocalyptic number.

216015620 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 216015620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234075744).

216015620 is an abundant number, since it is smaller than the sum of its proper divisors (252135868).

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

216015620 is a wasteful number, since it uses less digits than its factorization.

216015620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 216015620 is about 14697.4698502838. The cubic root of 216015620 is about 600.0144626143.

The spelling of 216015620 in words is "two hundred sixteen million, fifteen thousand, six hundred twenty".