8831221853 has 2 divisors, whose sum is σ = 8831221854. Its totient is φ = 8831221852.

The previous prime is 8831221843. The next prime is 8831221871. The reversal of 8831221853 is 3581221388.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8249543929 + 581677924 = 90827^2 + 24118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8831221853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8831221853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8831221843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4415610926 + 4415610927.

It is an arithmetic number, because the mean of its divisors is an integer number (4415610927).

Almost surely, 2^8831221853 is an apocalyptic number.

It is an amenable number.

8831221853 is a deficient number, since it is larger than the sum of its proper divisors (1).

8831221853 is an equidigital number, since it uses as much as digits as its factorization.

8831221853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 41.

The square root of 8831221853 is about 93974.5808875996. The cubic root of 8831221853 is about 2066.9989927802.

The spelling of 8831221853 in words is "eight billion, eight hundred thirty-one million, two hundred twenty-one thousand, eight hundred fifty-three".