216281919552 has 112 divisors (see below), whose sum is σ = 606063661632. Its totient is φ = 67835658240.

The previous prime is 216281919551. The next prime is 216281919593. The reversal of 216281919552 is 255919182612.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 216281919495 and 216281919504.

It is not an unprimeable number, because it can be changed into a prime (216281919551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19425027 + ... + 19436157.

Almost surely, 2^216281919552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216281919552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303031830816).

216281919552 is an abundant number, since it is smaller than the sum of its proper divisors (389781742080).

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

216281919552 is a wasteful number, since it uses less digits than its factorization.

216281919552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17116 (or 17106 counting only the distinct ones).

The product of its digits is 777600, while the sum is 51.

The spelling of 216281919552 in words is "two hundred sixteen billion, two hundred eighty-one million, nine hundred nineteen thousand, five hundred fifty-two".