1313550505 has 16 divisors (see below), whose sum is σ = 1674691920. Its totient is φ = 987178752.

The previous prime is 1313550449. The next prime is 1313550521. The reversal of 1313550505 is 5050553131.

It can be written as a sum of positive squares in 8 ways, for example, as 430336 + 1313120169 = 656^2 + 36237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313550505 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117054 + ... + 127783.

It is an arithmetic number, because the mean of its divisors is an integer number (104668245).

Almost surely, 2^1313550505 is an apocalyptic number.

It is an amenable number.

1313550505 is a deficient number, since it is larger than the sum of its proper divisors (361141415).

1313550505 is a wasteful number, since it uses less digits than its factorization.

1313550505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244908.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 1313550505 is about 36242.9373119785. The cubic root of 1313550505 is about 1095.1718154389.

The spelling of 1313550505 in words is "one billion, three hundred thirteen million, five hundred fifty thousand, five hundred five".