1381313525 has 6 divisors (see below), whose sum is σ = 1712828802. Its totient is φ = 1105050800.

The previous prime is 1381313501. The next prime is 1381313537. The reversal of 1381313525 is 5253131831.

It can be written as a sum of positive squares in 3 ways, for example, as 453136369 + 928177156 = 21287^2 + 30466^2 .

It is not a de Polignac number, because 1381313525 - 2²⁴ = 1364536309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381313491 and 1381313500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27626246 + ... + 27626295.

It is an arithmetic number, because the mean of its divisors is an integer number (285471467).

Almost surely, 2^1381313525 is an apocalyptic number.

It is an amenable number.

1381313525 is a deficient number, since it is larger than the sum of its proper divisors (331515277).

1381313525 is an equidigital number, since it uses as much as digits as its factorization.

1381313525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55252551 (or 55252546 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 1381313525 is about 37166.0264892549. The cubic root of 1381313525 is about 1113.6894050235.

The spelling of 1381313525 in words is "one billion, three hundred eighty-one million, three hundred thirteen thousand, five hundred twenty-five".