216101256 has 128 divisors (see below), whose sum is σ = 635040000. Its totient is φ = 60014592.

The previous prime is 216101251. The next prime is 216101287. The reversal of 216101256 is 652101612.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (216101251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1450270 + ... + 1450418.

It is an arithmetic number, because the mean of its divisors is an integer number (4961250).

Almost surely, 2^216101256 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 216101256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317520000).

216101256 is an abundant number, since it is smaller than the sum of its proper divisors (418938744).

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

216101256 is a wasteful number, since it uses less digits than its factorization.

216101256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 216101256 is about 14700.3828521573. The cubic root of 216101256 is about 600.0937409092.

Adding to 216101256 its reverse (652101612), we get a palindrome (868202868).

The spelling of 216101256 in words is "two hundred sixteen million, one hundred one thousand, two hundred fifty-six".