163213730 has 8 divisors (see below), whose sum is σ = 293784732. Its totient is φ = 65285488.

The previous prime is 163213709. The next prime is 163213747. The reversal of 163213730 is 37312361.

163213730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 134258569 + 28955161 = 11587^2 + 5381^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 163213730.

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, 8160677 + ... + 8160696.

Almost surely, 2^163213730 is an apocalyptic number.

163213730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163213730 is a deficient number, since it is larger than the sum of its proper divisors (130571002).

163213730 is a wasteful number, since it uses less digits than its factorization.

163213730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16321380.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 163213730 is about 12775.5129055549. The cubic root of 163213730 is about 546.4942078608.

The spelling of 163213730 in words is "one hundred sixty-three million, two hundred thirteen thousand, seven hundred thirty".