203140505 has 16 divisors (see below), whose sum is σ = 252752400. Its totient is φ = 156549120.

The previous prime is 203140501. The next prime is 203140523. The reversal of 203140505 is 505041302.

It can be written as a sum of positive squares in 8 ways, for example, as 41011216 + 162129289 = 6404^2 + 12733^2 .

It is not a de Polignac number, because 203140505 - 2² = 203140501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203140501) 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, 74201 + ... + 76889.

It is an arithmetic number, because the mean of its divisors is an integer number (15797025).

Almost surely, 2^203140505 is an apocalyptic number.

It is an amenable number.

203140505 is a deficient number, since it is larger than the sum of its proper divisors (49611895).

203140505 is a wasteful number, since it uses less digits than its factorization.

203140505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 203140505 is about 14252.7367547429. The cubic root of 203140505 is about 587.8486284499.

Adding to 203140505 its reverse (505041302), we get a palindrome (708181807).

The spelling of 203140505 in words is "two hundred three million, one hundred forty thousand, five hundred five".