2221415256 has 32 divisors (see below), whose sum is σ = 5794997760. Its totient is φ = 708277152.

The previous prime is 2221415221. The next prime is 2221415257. The reversal of 2221415256 is 6525141222.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221415257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2011600 + ... + 2012703.

It is an arithmetic number, because the mean of its divisors is an integer number (181093680).

Almost surely, 2^2221415256 is an apocalyptic number.

It is an amenable number.

2221415256 is an abundant number, since it is smaller than the sum of its proper divisors (3573582504).

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

2221415256 is a wasteful number, since it uses less digits than its factorization.

2221415256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024335 (or 4024331 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 2221415256 is about 47131.8921326102. The cubic root of 2221415256 is about 1304.7979029682.

Adding to 2221415256 its reverse (6525141222), we get a palindrome (8746556478).

The spelling of 2221415256 in words is "two billion, two hundred twenty-one million, four hundred fifteen thousand, two hundred fifty-six".