203825161 has 4 divisors (see below), whose sum is σ = 204016900. Its totient is φ = 203633424.

The previous prime is 203825159. The next prime is 203825191. The reversal of 203825161 is 161528302.

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 157653136 + 46172025 = 12556^2 + 6795^2 .

It is a cyclic number.

It is not a de Polignac number, because 203825161 - 2¹ = 203825159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203825131) 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, 94266 + ... + 96403.

It is an arithmetic number, because the mean of its divisors is an integer number (51004225).

Almost surely, 2^203825161 is an apocalyptic number.

It is an amenable number.

203825161 is a deficient number, since it is larger than the sum of its proper divisors (191739).

203825161 is a wasteful number, since it uses less digits than its factorization.

203825161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191738.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 203825161 is about 14276.7349558644. The cubic root of 203825161 is about 588.5083077768.

The spelling of 203825161 in words is "two hundred three million, eight hundred twenty-five thousand, one hundred sixty-one".