1313151520 has 24 divisors (see below), whose sum is σ = 3102320844. Its totient is φ = 525260544.

The previous prime is 1313151493. The next prime is 1313151527. The reversal of 1313151520 is 251513131.

It can be written as a sum of positive squares in 2 ways, for example, as 1307256336 + 5895184 = 36156^2 + 2428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1313151491 and 1313151500.

It is not an unprimeable number, because it can be changed into a prime (1313151527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4103439 + ... + 4103758.

Almost surely, 2^1313151520 is an apocalyptic number.

1313151520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313151520 is an abundant number, since it is smaller than the sum of its proper divisors (1789169324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1313151520 is an equidigital number, since it uses as much as digits as its factorization.

1313151520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207212 (or 8207204 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1313151520 is about 36237.4325801374. The cubic root of 1313151520 is about 1095.0609197218.

Adding to 1313151520 its reverse (251513131), we get a palindrome (1564664651).

The spelling of 1313151520 in words is "one billion, three hundred thirteen million, one hundred fifty-one thousand, five hundred twenty".