163535103333421 has 4 divisors (see below), whose sum is σ = 172142214035200. Its totient is φ = 154927992631644.

The previous prime is 163535103333377. The next prime is 163535103333463. The reversal of 163535103333421 is 124333301535361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163535103333421 - 2¹³ = 163535103325229 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 (163535103333491) 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, 4303555350861 + ... + 4303555350898.

It is an arithmetic number, because the mean of its divisors is an integer number (43035553508800).

Almost surely, 2^{163535103333421} is an apocalyptic number.

It is an amenable number.

163535103333421 is a deficient number, since it is larger than the sum of its proper divisors (8607110701779).

163535103333421 is an equidigital number, since it uses as much as digits as its factorization.

163535103333421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8607110701778.

The product of its (nonzero) digits is 874800, while the sum is 43.

Adding to 163535103333421 its reverse (124333301535361), we get a palindrome (287868404868782).

The spelling of 163535103333421 in words is "one hundred sixty-three trillion, five hundred thirty-five billion, one hundred three million, three hundred thirty-three thousand, four hundred twenty-one".