1318525533 has 42 divisors (see below), whose sum is σ = 2134674906. Its totient is φ = 809224992.

The previous prime is 1318525529. The next prime is 1318525543. The reversal of 1318525533 is 3355258131.

It can be written as a sum of positive squares in 3 ways, for example, as 75116889 + 1243408644 = 8667^2 + 35262^2 .

It is not a de Polignac number, because 1318525533 - 2² = 1318525529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318525543) by changing a digit.

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 41 ways as a sum of consecutive naturals, for example, 3534735 + ... + 3535107.

It is an arithmetic number, because the mean of its divisors is an integer number (50825593).

Almost surely, 2^1318525533 is an apocalyptic number.

1318525533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1318525533 is a deficient number, since it is larger than the sum of its proper divisors (816149373).

1318525533 is an frugal number, since it uses more digits than its factorization.

1318525533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 389 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 1318525533 is about 36311.5068951978. The cubic root of 1318525533 is about 1096.5527155719.

It can be divided in two parts, 1318 and 525533, that added together give a triangular number (526851 = T₁₀₂₆).

The spelling of 1318525533 in words is "one billion, three hundred eighteen million, five hundred twenty-five thousand, five hundred thirty-three".