163962221 has 4 divisors (see below), whose sum is σ = 164402172. Its totient is φ = 163522272.

The previous prime is 163962203. The next prime is 163962223. The reversal of 163962221 is 122269361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50965321 + 112996900 = 7139^2 + 10630^2 .

It is a cyclic number.

It is not a de Polignac number, because 163962221 - 2¹⁰ = 163961197 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 (163962223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219416 + ... + 220161.

It is an arithmetic number, because the mean of its divisors is an integer number (41100543).

Almost surely, 2^163962221 is an apocalyptic number.

It is an amenable number.

163962221 is a deficient number, since it is larger than the sum of its proper divisors (439951).

163962221 is an equidigital number, since it uses as much as digits as its factorization.

163962221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439950.

The product of its digits is 7776, while the sum is 32.

The square root of 163962221 is about 12804.7733677719. The cubic root of 163962221 is about 547.3283335506.

The spelling of 163962221 in words is "one hundred sixty-three million, nine hundred sixty-two thousand, two hundred twenty-one".