203981153 has 6 divisors (see below), whose sum is σ = 207905334. Its totient is φ = 200129696.

The previous prime is 203981137. The next prime is 203981171. The reversal of 203981153 is 351189302.

It can be written as a sum of positive squares in 3 ways, for example, as 135885649 + 68095504 = 11657^2 + 8252^2 .

It is not a de Polignac number, because 203981153 - 2⁴ = 203981137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203981353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33500 + ... + 39117.

It is an arithmetic number, because the mean of its divisors is an integer number (34650889).

Almost surely, 2^203981153 is an apocalyptic number.

It is an amenable number.

203981153 is a deficient number, since it is larger than the sum of its proper divisors (3924181).

203981153 is an frugal number, since it uses more digits than its factorization.

203981153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72723 (or 72670 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 203981153 is about 14282.1970648777. The cubic root of 203981153 is about 588.6584023938.

The spelling of 203981153 in words is "two hundred three million, nine hundred eighty-one thousand, one hundred fifty-three".