216720222400 has 168 divisors, whose sum is σ = 592724924784. Its totient is φ = 77320089600.

The previous prime is 216720222379. The next prime is 216720222457. The reversal of 216720222400 is 4222027612.

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, 816634 + ... + 1048966.

Almost surely, 2^216720222400 is an apocalyptic number.

216720222400 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 216720222400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296362462392).

216720222400 is an abundant number, since it is smaller than the sum of its proper divisors (376004702384).

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

216720222400 is a wasteful number, since it uses less digits than its factorization.

216720222400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232419 (or 232404 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The spelling of 216720222400 in words is "two hundred sixteen billion, seven hundred twenty million, two hundred twenty-two thousand, four hundred".