1315731244 has 12 divisors (see below), whose sum is σ = 2303734384. Its totient is φ = 657521424.

The previous prime is 1315731229. The next prime is 1315731253. The reversal of 1315731244 is 4421375131.

It is a super-2 number, since 2×1315731244² = 3462297412875575072, which contains 22 as substring.

It is an unprimeable number.

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, 77352 + ... + 92815.

Almost surely, 2^1315731244 is an apocalyptic number.

It is an amenable number.

1315731244 is a deficient number, since it is larger than the sum of its proper divisors (988003140).

1315731244 is a wasteful number, since it uses less digits than its factorization.

1315731244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172104 (or 172102 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 1315731244 is about 36273.0098558143. The cubic root of 1315731244 is about 1095.7775435609. Note that the first 3 decimals are identical.

It can be divided in two parts, 131 and 5731244, that added together give a palindrome (5731375).

The spelling of 1315731244 in words is "one billion, three hundred fifteen million, seven hundred thirty-one thousand, two hundred forty-four".