203228161 has 16 divisors (see below), whose sum is σ = 229276800. Its totient is φ = 179169408.

The previous prime is 203228159. The next prime is 203228171. The reversal of 203228161 is 161822302.

It is a cyclic number.

It is not a de Polignac number, because 203228161 - 2¹ = 203228159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203228171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9885 + ... + 22453.

It is an arithmetic number, because the mean of its divisors is an integer number (14329800).

Almost surely, 2^203228161 is an apocalyptic number.

It is an amenable number.

203228161 is a deficient number, since it is larger than the sum of its proper divisors (26048639).

203228161 is a wasteful number, since it uses less digits than its factorization.

203228161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12648.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 203228161 is about 14255.8114816379. The cubic root of 203228161 is about 587.9331693601.

The spelling of 203228161 in words is "two hundred three million, two hundred twenty-eight thousand, one hundred sixty-one".