2215040256 has 504 divisors, whose sum is σ = 7881876576. Its totient is φ = 612126720.

The previous prime is 2215040251. The next prime is 2215040257. The reversal of 2215040256 is 6520405122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215040251) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 26687191 + ... + 26687273.

It is an arithmetic number, because the mean of its divisors is an integer number (15638644).

Almost surely, 2^2215040256 is an apocalyptic number.

2215040256 is a gapful number since it is divisible by the number (26) 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 2215040256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3940938288).

2215040256 is an abundant number, since it is smaller than the sum of its proper divisors (5666836320).

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

2215040256 is an equidigital number, since it uses as much as digits as its factorization.

2215040256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2215040256 is about 47064.2141759533. The cubic root of 2215040256 is about 1303.5485408210.

Adding to 2215040256 its reverse (6520405122), we get a palindrome (8735445378).

The spelling of 2215040256 in words is "two billion, two hundred fifteen million, forty thousand, two hundred fifty-six".