1331541545 has 8 divisors (see below), whose sum is σ = 1598108424. Its totient is φ = 1065060864.

The previous prime is 1331541529. The next prime is 1331541557. The reversal of 1331541545 is 5451451331.

It can be written as a sum of positive squares in 4 ways, for example, as 353853721 + 977687824 = 18811^2 + 31268^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331541545 - 2⁴ = 1331541529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19577 + ... + 55193.

It is an arithmetic number, because the mean of its divisors is an integer number (199763553).

Almost surely, 2^1331541545 is an apocalyptic number.

It is an amenable number.

1331541545 is a deficient number, since it is larger than the sum of its proper divisors (266566879).

1331541545 is an equidigital number, since it uses as much as digits as its factorization.

1331541545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43099.

The product of its digits is 18000, while the sum is 32.

The square root of 1331541545 is about 36490.2938464463. The cubic root of 1331541545 is about 1100.1491657219.

Adding to 1331541545 its reverse (5451451331), we get a palindrome (6782992876).

The spelling of 1331541545 in words is "one billion, three hundred thirty-one million, five hundred forty-one thousand, five hundred forty-five".