1311534445 has 32 divisors (see below), whose sum is σ = 1838440800. Its totient is φ = 889282560.

The previous prime is 1311534437. The next prime is 1311534481. The reversal of 1311534445 is 5444351131.

It can be written as a sum of positive squares in 16 ways, for example, as 239692324 + 1071842121 = 15482^2 + 32739^2 .

It is not a de Polignac number, because 1311534445 - 2³ = 1311534437 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 30831 + ... + 59779.

It is an arithmetic number, because the mean of its divisors is an integer number (57451275).

Almost surely, 2^1311534445 is an apocalyptic number.

It is an amenable number.

1311534445 is a deficient number, since it is larger than the sum of its proper divisors (526906355).

1311534445 is a wasteful number, since it uses less digits than its factorization.

1311534445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29025.

The product of its digits is 14400, while the sum is 31.

The square root of 1311534445 is about 36215.1134887080. The cubic root of 1311534445 is about 1094.6112323382.

Adding to 1311534445 its reverse (5444351131), we get a palindrome (6755885576).

The spelling of 1311534445 in words is "one billion, three hundred eleven million, five hundred thirty-four thousand, four hundred forty-five".