2217249747 has 8 divisors (see below), whose sum is σ = 3284814480. Its totient is φ = 1478166480.

The previous prime is 2217249689. The next prime is 2217249751. The reversal of 2217249747 is 7479427122.

It is not a de Polignac number, because 2217249747 - 2¹² = 2217245651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2217249757) 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 7 ways as a sum of consecutive naturals, for example, 41060154 + ... + 41060207.

It is an arithmetic number, because the mean of its divisors is an integer number (410601810).

Almost surely, 2^2217249747 is an apocalyptic number.

2217249747 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2217249747 is a deficient number, since it is larger than the sum of its proper divisors (1067564733).

2217249747 is an equidigital number, since it uses as much as digits as its factorization.

2217249747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82120370 (or 82120364 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 2217249747 is about 47087.6814782805. The cubic root of 2217249747 is about 1303.9818243904.

The spelling of 2217249747 in words is "two billion, two hundred seventeen million, two hundred forty-nine thousand, seven hundred forty-seven".