1311533125 has 40 divisors (see below), whose sum is σ = 1905140160. Its totient is φ = 883920000.

The previous prime is 1311533099. The next prime is 1311533131. The reversal of 1311533125 is 5213351131.

It is not a de Polignac number, because 1311533125 - 2¹⁵ = 1311500357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1311533125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 255585 + ... + 260665.

It is an arithmetic number, because the mean of its divisors is an integer number (47628504).

Almost surely, 2^1311533125 is an apocalyptic number.

It is an amenable number.

1311533125 is a deficient number, since it is larger than the sum of its proper divisors (593607035).

1311533125 is an frugal number, since it uses more digits than its factorization.

1311533125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167 (or 5152 counting only the distinct ones).

The product of its digits is 1350, while the sum is 25.

The square root of 1311533125 is about 36215.0952642679. The cubic root of 1311533125 is about 1094.6108651125.

Adding to 1311533125 its reverse (5213351131), we get a palindrome (6524884256).

The spelling of 1311533125 in words is "one billion, three hundred eleven million, five hundred thirty-three thousand, one hundred twenty-five".