163621330 has 8 divisors (see below), whose sum is σ = 294518412. Its totient is φ = 65448528.

The previous prime is 163621327. The next prime is 163621343. The reversal of 163621330 is 33126361.

It can be written as a sum of positive squares in 2 ways, for example, as 139972561 + 23648769 = 11831^2 + 4863^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 163621295 and 163621304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8181057 + ... + 8181076.

Almost surely, 2^163621330 is an apocalyptic number.

163621330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163621330 is a deficient number, since it is larger than the sum of its proper divisors (130897082).

163621330 is a wasteful number, since it uses less digits than its factorization.

163621330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16362140.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 163621330 is about 12791.4553511319. The cubic root of 163621330 is about 546.9487567677.

Adding to 163621330 its reverse (33126361), we get a palindrome (196747691).

The spelling of 163621330 in words is "one hundred sixty-three million, six hundred twenty-one thousand, three hundred thirty".