1313551115 has 4 divisors (see below), whose sum is σ = 1576261344. Its totient is φ = 1050840888.

The previous prime is 1313551103. The next prime is 1313551117. The reversal of 1313551115 is 5111553131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5111553131 = 439 ⋅11643629.

It is a cyclic number.

It is not a de Polignac number, because 1313551115 - 2⁶ = 1313551051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313551117) 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, 131355107 + ... + 131355116.

It is an arithmetic number, because the mean of its divisors is an integer number (394065336).

Almost surely, 2^1313551115 is an apocalyptic number.

1313551115 is a deficient number, since it is larger than the sum of its proper divisors (262710229).

1313551115 is an equidigital number, since it uses as much as digits as its factorization.

1313551115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262710228.

The product of its digits is 1125, while the sum is 26.

The square root of 1313551115 is about 36242.9457274102. The cubic root of 1313551115 is about 1095.1719849679.

The spelling of 1313551115 in words is "one billion, three hundred thirteen million, five hundred fifty-one thousand, one hundred fifteen".