1315431203 has 4 divisors (see below), whose sum is σ = 1372623888. Its totient is φ = 1258238520.

The previous prime is 1315431179. The next prime is 1315431223. The reversal of 1315431203 is 3021345131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315431203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 57192661 = 1315431203 / (1 + 3 + 1 + 5 + 4 + 3 + 1 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315431223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28596308 + ... + 28596353.

It is an arithmetic number, because the mean of its divisors is an integer number (343155972).

Almost surely, 2^1315431203 is an apocalyptic number.

1315431203 is a deficient number, since it is larger than the sum of its proper divisors (57192685).

1315431203 is an equidigital number, since it uses as much as digits as its factorization.

1315431203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57192684.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1315431203 is about 36268.8737487119. The cubic root of 1315431203 is about 1095.6942430677.

Adding to 1315431203 its reverse (3021345131), we get a palindrome (4336776334).

The spelling of 1315431203 in words is "one billion, three hundred fifteen million, four hundred thirty-one thousand, two hundred three".