8881952221 has 16 divisors (see below), whose sum is σ = 9206710128. Its totient is φ = 8562688000.

The previous prime is 8881952213. The next prime is 8881952227. The reversal of 8881952221 is 1222591888.

It can be written as a sum of positive squares in 8 ways, for example, as 718829721 + 8163122500 = 26811^2 + 90350^2 .

It is a cyclic number.

It is not a de Polignac number, because 8881952221 - 2³ = 8881952213 is a prime.

It is a super-2 number, since 2×8881952221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8881952227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2453805 + ... + 2457421.

It is an arithmetic number, because the mean of its divisors is an integer number (575419383).

Almost surely, 2^8881952221 is an apocalyptic number.

It is an amenable number.

8881952221 is a deficient number, since it is larger than the sum of its proper divisors (324757907).

8881952221 is a wasteful number, since it uses less digits than its factorization.

8881952221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352.

The product of its digits is 184320, while the sum is 46.

The square root of 8881952221 is about 94244.1097416703. The cubic root of 8881952221 is about 2070.9493510757.

The spelling of 8881952221 in words is "eight billion, eight hundred eighty-one million, nine hundred fifty-two thousand, two hundred twenty-one".