1313251503 has 4 divisors (see below), whose sum is σ = 1751002008. Its totient is φ = 875501000.

The previous prime is 1313251469. The next prime is 1313251507. The reversal of 1313251503 is 3051523131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3051523131 = 3 ⋅1017174377.

It is a cyclic number.

It is not a de Polignac number, because 1313251503 - 2³⁰ = 239509679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313251507) 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, 218875248 + ... + 218875253.

It is an arithmetic number, because the mean of its divisors is an integer number (437750502).

Almost surely, 2^1313251503 is an apocalyptic number.

1313251503 is a deficient number, since it is larger than the sum of its proper divisors (437750505).

1313251503 is an equidigital number, since it uses as much as digits as its factorization.

1313251503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437750504.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 1313251503 is about 36238.8121080148. The cubic root of 1313251503 is about 1095.0887115635.

Adding to 1313251503 its reverse (3051523131), we get a palindrome (4364774634).

The spelling of 1313251503 in words is "one billion, three hundred thirteen million, two hundred fifty-one thousand, five hundred three".