1331315445 has 16 divisors (see below), whose sum is σ = 2142421632. Its totient is φ = 705929280.

The previous prime is 1331315443. The next prime is 1331315449. The reversal of 1331315445 is 5445131331.

It is not a de Polignac number, because 1331315445 - 2¹ = 1331315443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331315443) 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 15 ways as a sum of consecutive naturals, for example, 253921 + ... + 259110.

It is an arithmetic number, because the mean of its divisors is an integer number (133901352).

Almost surely, 2^1331315445 is an apocalyptic number.

1331315445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331315445 is a deficient number, since it is larger than the sum of its proper divisors (811106187).

1331315445 is a wasteful number, since it uses less digits than its factorization.

1331315445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513212.

The product of its digits is 10800, while the sum is 30.

The square root of 1331315445 is about 36487.1956307963. The cubic root of 1331315445 is about 1100.0868925849.

Adding to 1331315445 its reverse (5445131331), we get a palindrome (6776446776).

The spelling of 1331315445 in words is "one billion, three hundred thirty-one million, three hundred fifteen thousand, four hundred forty-five".