203163161 has 8 divisors (see below), whose sum is σ = 206427144. Its totient is φ = 199912320.

The previous prime is 203163127. The next prime is 203163173. The reversal of 203163161 is 161361302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5929225 + 197233936 = 2435^2 + 14044^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 203163161 - 2⁶ = 203163097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203163061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30635 + ... + 36671.

It is an arithmetic number, because the mean of its divisors is an integer number (25803393).

Almost surely, 2^203163161 is an apocalyptic number.

It is an amenable number.

203163161 is a deficient number, since it is larger than the sum of its proper divisors (3263983).

203163161 is an equidigital number, since it uses as much as digits as its factorization.

203163161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 203163161 is about 14253.5315273093. The cubic root of 203163161 is about 587.8704816387.

The spelling of 203163161 in words is "two hundred three million, one hundred sixty-three thousand, one hundred sixty-one".