215099712000 has 480 divisors, whose sum is σ = 803501322624. Its totient is φ = 57355776000.

The previous prime is 215099711971. The next prime is 215099712011. The reversal of 215099712000 is 217990512.

215099712000 is a `hidden beast` number, since 21 + 509 + 9 + 7 + 120 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×215099712000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15545085 + ... + 15558915.

Almost surely, 2^215099712000 is an apocalyptic number.

215099712000 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 215099712000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401750661312).

215099712000 is an abundant number, since it is smaller than the sum of its proper divisors (588401610624).

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

215099712000 is an frugal number, since it uses more digits than its factorization.

215099712000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13879 (or 13841 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 215099712000 in words is "two hundred fifteen billion, ninety-nine million, seven hundred twelve thousand".