1316131556 has 12 divisors (see below), whose sum is σ = 2303569968. Its totient is φ = 657968712.

The previous prime is 1316131549. The next prime is 1316131559. The reversal of 1316131556 is 6551316131.

It is a super-2 number, since 2×1316131556² = 3464404545397962272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1316131559) 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, 12395 + ... + 52781.

It is an arithmetic number, because the mean of its divisors is an integer number (191964164).

Almost surely, 2^1316131556 is an apocalyptic number.

It is an amenable number.

1316131556 is a deficient number, since it is larger than the sum of its proper divisors (987438412).

1316131556 is a wasteful number, since it uses less digits than its factorization.

1316131556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48538 (or 48536 counting only the distinct ones).

The product of its digits is 8100, while the sum is 32.

The square root of 1316131556 is about 36278.5274783859. The cubic root of 1316131556 is about 1095.8886626117. Note that the first 3 decimals are identical.

Adding to 1316131556 its reverse (6551316131), we get a palindrome (7867447687).

The spelling of 1316131556 in words is "one billion, three hundred sixteen million, one hundred thirty-one thousand, five hundred fifty-six".