1312543005320 has 32 divisors (see below), whose sum is σ = 2953608543000. Its totient is φ = 524948441088.

The previous prime is 1312543005247. The next prime is 1312543005349. The reversal of 1312543005320 is 235003452131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 502712196484 + 809830808836 = 709022^2 + 899906^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838999 + ... + 2450918.

Almost surely, 2^{1312543005320} is an apocalyptic number.

1312543005320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312543005320 is an abundant number, since it is smaller than the sum of its proper divisors (1641065537680).

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

1312543005320 is a wasteful number, since it uses less digits than its factorization.

1312543005320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297577 (or 4297573 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 1312543005320 its reverse (235003452131), we get a palindrome (1547546457451).

The spelling of 1312543005320 in words is "one trillion, three hundred twelve billion, five hundred forty-three million, five thousand, three hundred twenty".