1331231045 has 16 divisors (see below), whose sum is σ = 1606746240. Its totient is φ = 1058823744.

The previous prime is 1331230987. The next prime is 1331231059. The reversal of 1331231045 is 5401321331.

It is a cyclic number.

It is not a de Polignac number, because 1331231045 - 2²⁸ = 1062795589 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331231045.

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 15 ways as a sum of consecutive naturals, for example, 1244771 + ... + 1245839.

It is an arithmetic number, because the mean of its divisors is an integer number (100421640).

Almost surely, 2^1331231045 is an apocalyptic number.

It is an amenable number.

1331231045 is a deficient number, since it is larger than the sum of its proper divisors (275515195).

1331231045 is a wasteful number, since it uses less digits than its factorization.

1331231045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1331231045 is about 36486.0390423515. The cubic root of 1331231045 is about 1100.0636450778.

Adding to 1331231045 its reverse (5401321331), we get a palindrome (6732552376).

The spelling of 1331231045 in words is "one billion, three hundred thirty-one million, two hundred thirty-one thousand, forty-five".