8813402221 has 12 divisors (see below), whose sum is σ = 9552438228. Its totient is φ = 8127834624.

The previous prime is 8813402167. The next prime is 8813402231. The reversal of 8813402221 is 1222043188.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 729594121 + 8083808100 = 27011^2 + 89910^2 .

It is not a de Polignac number, because 8813402221 - 2¹⁹ = 8812877933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8813402231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160861 + ... + 208573.

It is an arithmetic number, because the mean of its divisors is an integer number (796036519).

Almost surely, 2^8813402221 is an apocalyptic number.

It is an amenable number.

8813402221 is a deficient number, since it is larger than the sum of its proper divisors (739036007).

8813402221 is a wasteful number, since it uses less digits than its factorization.

8813402221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48832 (or 48819 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 8813402221 is about 93879.7220969470. The cubic root of 8813402221 is about 2065.6077936992.

The spelling of 8813402221 in words is "eight billion, eight hundred thirteen million, four hundred two thousand, two hundred twenty-one".