163240213 has 4 divisors (see below), whose sum is σ = 163708300. Its totient is φ = 162772128.

The previous prime is 163240201. The next prime is 163240219. The reversal of 163240213 is 312042361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312042361 = 17 ⋅18355433.

It can be written as a sum of positive squares in 2 ways, for example, as 73994404 + 89245809 = 8602^2 + 9447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163240213 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 (163240219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233520 + ... + 234217.

It is an arithmetic number, because the mean of its divisors is an integer number (40927075).

Almost surely, 2^163240213 is an apocalyptic number.

It is an amenable number.

163240213 is a deficient number, since it is larger than the sum of its proper divisors (468087).

163240213 is an equidigital number, since it uses as much as digits as its factorization.

163240213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468086.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 163240213 is about 12776.5493385343. The cubic root of 163240213 is about 546.5237642455.

Adding to 163240213 its reverse (312042361), we get a palindrome (475282574).

The spelling of 163240213 in words is "one hundred sixty-three million, two hundred forty thousand, two hundred thirteen".