8221252747 has 8 divisors (see below), whose sum is σ = 8660527760. Its totient is φ = 7782635520.

The previous prime is 8221252727. The next prime is 8221252759. The reversal of 8221252747 is 7472521228.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8221252747 - 2¹¹ = 8221250699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221252727) 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, 138678 + ... + 188875.

It is an arithmetic number, because the mean of its divisors is an integer number (1082565970).

Almost surely, 2^8221252747 is an apocalyptic number.

8221252747 is a deficient number, since it is larger than the sum of its proper divisors (439275013).

8221252747 is a wasteful number, since it uses less digits than its factorization.

8221252747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328893.

The product of its digits is 125440, while the sum is 40.

The square root of 8221252747 is about 90671.1241079540. The cubic root of 8221252747 is about 2018.2703184228.

The spelling of 8221252747 in words is "eight billion, two hundred twenty-one million, two hundred fifty-two thousand, seven hundred forty-seven".