986442221 has 16 divisors (see below), whose sum is σ = 1084330800. Its totient is φ = 893211648.

The previous prime is 986442169. The next prime is 986442257. The reversal of 986442221 is 122244689.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 191822500 + 794619721 = 13850^2 + 28189^2 .

It is a cyclic number.

It is not a de Polignac number, because 986442221 - 2¹⁸ = 986180077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986442271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141035 + ... + 147863.

It is an arithmetic number, because the mean of its divisors is an integer number (67770675).

Almost surely, 2^986442221 is an apocalyptic number.

It is an amenable number.

986442221 is a deficient number, since it is larger than the sum of its proper divisors (97888579).

986442221 is a wasteful number, since it uses less digits than its factorization.

986442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7168.

The product of its digits is 55296, while the sum is 38.

The square root of 986442221 is about 31407.6777396865. The cubic root of 986442221 is about 995.4601613876.

The spelling of 986442221 in words is "nine hundred eighty-six million, four hundred forty-two thousand, two hundred twenty-one".