163304421 has 16 divisors (see below), whose sum is σ = 255571584. Its totient is φ = 90794304.

The previous prime is 163304417. The next prime is 163304437. The reversal of 163304421 is 124403361.

It is not a de Polignac number, because 163304421 - 2² = 163304417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163304391 and 163304400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163304521) 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, 104310 + ... + 105863.

It is an arithmetic number, because the mean of its divisors is an integer number (15973224).

Almost surely, 2^163304421 is an apocalyptic number.

It is an amenable number.

163304421 is a deficient number, since it is larger than the sum of its proper divisors (92267163).

163304421 is a wasteful number, since it uses less digits than its factorization.

163304421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210220.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 163304421 is about 12779.0618200242. The cubic root of 163304421 is about 546.5954103948.

Adding to 163304421 its reverse (124403361), we get a palindrome (287707782).

The spelling of 163304421 in words is "one hundred sixty-three million, three hundred four thousand, four hundred twenty-one".