1003131205 has 4 divisors (see below), whose sum is σ = 1203757452. Its totient is φ = 802504960.

The previous prime is 1003131197. The next prime is 1003131209. The reversal of 1003131205 is 5021313001.

1003131205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 188485441 + 814645764 = 13729^2 + 28542^2 .

It is not a de Polignac number, because 1003131205 - 2³ = 1003131197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003131209) 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, 100313116 + ... + 100313125.

It is an arithmetic number, because the mean of its divisors is an integer number (300939363).

Almost surely, 2^1003131205 is an apocalyptic number.

It is an amenable number.

1003131205 is a deficient number, since it is larger than the sum of its proper divisors (200626247).

1003131205 is an equidigital number, since it uses as much as digits as its factorization.

1003131205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200626246.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1003131205 is about 31672.2466048747. The cubic root of 1003131205 is about 1001.0426475083.

Adding to 1003131205 its reverse (5021313001), we get a palindrome (6024444206).

The spelling of 1003131205 in words is "one billion, three million, one hundred thirty-one thousand, two hundred five".