163207421 has 8 divisors (see below), whose sum is σ = 177405984. Its totient is φ = 149243760.

The previous prime is 163207381. The next prime is 163207433. The reversal of 163207421 is 124702361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163207421 - 2⁶ = 163207357 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 (163207441) 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 7 ways as a sum of consecutive naturals, for example, 57275 + ... + 60056.

It is an arithmetic number, because the mean of its divisors is an integer number (22175748).

Almost surely, 2^163207421 is an apocalyptic number.

It is an amenable number.

163207421 is a deficient number, since it is larger than the sum of its proper divisors (14198563).

163207421 is a wasteful number, since it uses less digits than its factorization.

163207421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117451.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 163207421 is about 12775.2659854893. The cubic root of 163207421 is about 546.4871662220.

Adding to 163207421 its reverse (124702361), we get a palindrome (287909782).

The spelling of 163207421 in words is "one hundred sixty-three million, two hundred seven thousand, four hundred twenty-one".