163230140221 has 4 divisors (see below), whose sum is σ = 163383986844. Its totient is φ = 163076293600.

The previous prime is 163230140219. The next prime is 163230140291. The reversal of 163230140221 is 122041032361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105550912996 + 57679227225 = 324886^2 + 240165^2 .

It is a cyclic number.

It is not a de Polignac number, because 163230140221 - 2¹ = 163230140219 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 (163230140291) 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, 76921720 + ... + 76923841.

It is an arithmetic number, because the mean of its divisors is an integer number (40845996711).

Almost surely, 2^163230140221 is an apocalyptic number.

It is an amenable number.

163230140221 is a deficient number, since it is larger than the sum of its proper divisors (153846623).

163230140221 is a wasteful number, since it uses less digits than its factorization.

163230140221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153846622.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 163230140221 its reverse (122041032361), we get a palindrome (285271172582).

The spelling of 163230140221 in words is "one hundred sixty-three billion, two hundred thirty million, one hundred forty thousand, two hundred twenty-one".