8221267972 has 12 divisors (see below), whose sum is σ = 14402322396. Its totient is φ = 4106318720.

The previous prime is 8221267969. The next prime is 8221267973. The reversal of 8221267972 is 2797621228.

It can be written as a sum of positive squares in 2 ways, for example, as 2926377216 + 5294890756 = 54096^2 + 72766^2 .

It is not an unprimeable number, because it can be changed into a prime (8221267973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074529 + ... + 1082152.

It is an arithmetic number, because the mean of its divisors is an integer number (1200193533).

Almost surely, 2^8221267972 is an apocalyptic number.

It is an amenable number.

8221267972 is a deficient number, since it is larger than the sum of its proper divisors (6181054424).

8221267972 is a wasteful number, since it uses less digits than its factorization.

8221267972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157638 (or 2157636 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 8221267972 is about 90671.2080651846. The cubic root of 8221267972 is about 2018.2715643053.

The spelling of 8221267972 in words is "eight billion, two hundred twenty-one million, two hundred sixty-seven thousand, nine hundred seventy-two".