2221515536 has 160 divisors (see below), whose sum is σ = 4902543360. Its totient is φ = 971131392.

The previous prime is 2221515523. The next prime is 2221515547. The reversal of 2221515536 is 6355151222.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21568061 + ... + 21568163.

It is an arithmetic number, because the mean of its divisors is an integer number (30640896).

Almost surely, 2^2221515536 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 2221515536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2451271680).

2221515536 is an abundant number, since it is smaller than the sum of its proper divisors (2681027824).

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

2221515536 is a wasteful number, since it uses less digits than its factorization.

2221515536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 247 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 2221515536 is about 47132.9559437980. The cubic root of 2221515536 is about 1304.8175365725.

Adding to 2221515536 its reverse (6355151222), we get a palindrome (8576666758).

The spelling of 2221515536 in words is "two billion, two hundred twenty-one million, five hundred fifteen thousand, five hundred thirty-six".