2236521216 has 72 divisors (see below), whose sum is σ = 5966264304. Its totient is φ = 743772160.

The previous prime is 2236521191. The next prime is 2236521227. The reversal of 2236521216 is 6121256322.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350890 + ... + 357206.

It is an arithmetic number, because the mean of its divisors is an integer number (82864782).

Almost surely, 2^2236521216 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 2236521216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2983132152).

2236521216 is an abundant number, since it is smaller than the sum of its proper divisors (3729743088).

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

2236521216 is an equidigital number, since it uses as much as digits as its factorization.

2236521216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6797 (or 6783 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 2236521216 is about 47291.8726209906. The cubic root of 2236521216 is about 1307.7488318706.

Adding to 2236521216 its reverse (6121256322), we get a palindrome (8357777538).

The spelling of 2236521216 in words is "two billion, two hundred thirty-six million, five hundred twenty-one thousand, two hundred sixteen".