2221515347 has 4 divisors (see below), whose sum is σ = 2229535536. Its totient is φ = 2213495160.

The previous prime is 2221515343. The next prime is 2221515403. The reversal of 2221515347 is 7435151222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7435151222 = 2 ⋅3717575611.

It is a cyclic number.

It is not a de Polignac number, because 2221515347 - 2² = 2221515343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221515343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4009679 + ... + 4010232.

It is an arithmetic number, because the mean of its divisors is an integer number (557383884).

Almost surely, 2^2221515347 is an apocalyptic number.

2221515347 is a deficient number, since it is larger than the sum of its proper divisors (8020189).

2221515347 is an equidigital number, since it uses as much as digits as its factorization.

2221515347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8020188.

The product of its digits is 16800, while the sum is 32.

The square root of 2221515347 is about 47132.9539388314. The cubic root of 2221515347 is about 1304.8174995692.

Adding to 2221515347 its reverse (7435151222), we get a palindrome (9656666569).

The spelling of 2221515347 in words is "two billion, two hundred twenty-one million, five hundred fifteen thousand, three hundred forty-seven".