1311500545 has 32 divisors (see below), whose sum is σ = 1629388800. Its totient is φ = 1013031360.

The previous prime is 1311500527. The next prime is 1311500573. The reversal of 1311500545 is 5450051131.

It is a happy number.

It is not a de Polignac number, because 1311500545 - 2⁷ = 1311500417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6590356 + ... + 6590554.

It is an arithmetic number, because the mean of its divisors is an integer number (50918400).

Almost surely, 2^1311500545 is an apocalyptic number.

It is an amenable number.

1311500545 is a deficient number, since it is larger than the sum of its proper divisors (317888255).

1311500545 is a wasteful number, since it uses less digits than its factorization.

1311500545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1311500545 is about 36214.6454490445. The cubic root of 1311500545 is about 1094.6018012374.

Adding to 1311500545 its reverse (5450051131), we get a palindrome (6761551676).

The spelling of 1311500545 in words is "one billion, three hundred eleven million, five hundred thousand, five hundred forty-five".