881995221 has 6 divisors (see below), whose sum is σ = 1273993110. Its totient is φ = 587996808.

The previous prime is 881995211. The next prime is 881995223. The reversal of 881995221 is 122599188.

881995221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 722856996 + 159138225 = 26886^2 + 12615^2 .

It is not a de Polignac number, because 881995221 - 2⁹ = 881994709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881995223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48999726 + ... + 48999743.

It is an arithmetic number, because the mean of its divisors is an integer number (212332185).

Almost surely, 2^881995221 is an apocalyptic number.

It is an amenable number.

881995221 is a deficient number, since it is larger than the sum of its proper divisors (391997889).

881995221 is a wasteful number, since it uses less digits than its factorization.

881995221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97999475 (or 97999472 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 881995221 is about 29698.4043510758. The cubic root of 881995221 is about 959.0076627407.

The spelling of 881995221 in words is "eight hundred eighty-one million, nine hundred ninety-five thousand, two hundred twenty-one".