203040145 has 16 divisors (see below), whose sum is σ = 303769728. Its totient is φ = 126570240.

The previous prime is 203040143. The next prime is 203040157. The reversal of 203040145 is 541040302.

It is not a de Polignac number, because 203040145 - 2¹ = 203040143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203040143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263304 + ... + 264073.

It is an arithmetic number, because the mean of its divisors is an integer number (18985608).

Almost surely, 2^203040145 is an apocalyptic number.

It is an amenable number.

203040145 is a deficient number, since it is larger than the sum of its proper divisors (100729583).

203040145 is a wasteful number, since it uses less digits than its factorization.

203040145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527400.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 203040145 is about 14249.2155924458. The cubic root of 203040145 is about 587.7518051426.

Adding to 203040145 its reverse (541040302), we get a palindrome (744080447).

The spelling of 203040145 in words is "two hundred three million, forty thousand, one hundred forty-five".