1311634550 has 12 divisors (see below), whose sum is σ = 2439640356. Its totient is φ = 524653800.

The previous prime is 1311634531. The next prime is 1311634553. The reversal of 1311634550 is 554361131.

1311634550 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311634553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13116296 + ... + 13116395.

It is an arithmetic number, because the mean of its divisors is an integer number (203303363).

Almost surely, 2^1311634550 is an apocalyptic number.

1311634550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311634550 is a deficient number, since it is larger than the sum of its proper divisors (1128005806).

1311634550 is a wasteful number, since it uses less digits than its factorization.

1311634550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26232703 (or 26232698 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1311634550 is about 36216.4955510607. The cubic root of 1311634550 is about 1094.6390809573.

Adding to 1311634550 its reverse (554361131), we get a palindrome (1865995681).

The spelling of 1311634550 in words is "one billion, three hundred eleven million, six hundred thirty-four thousand, five hundred fifty".