1311422551505 has 12 divisors (see below), whose sum is σ = 1729777184436. Its totient is φ = 953761855200.

The previous prime is 1311422551421. The next prime is 1311422551511. The reversal of 1311422551505 is 5051552241131.

It can be written as a sum of positive squares in 2 ways, for example, as 378589167616 + 932833383889 = 615296^2 + 965833^2 .

It is not a de Polignac number, because 1311422551505 - 2¹⁴ = 1311422535121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1083819686 + ... + 1083820895.

It is an arithmetic number, because the mean of its divisors is an integer number (144148098703).

Almost surely, 2^{1311422551505} is an apocalyptic number.

It is an amenable number.

1311422551505 is a deficient number, since it is larger than the sum of its proper divisors (418354632931).

1311422551505 is a wasteful number, since it uses less digits than its factorization.

1311422551505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167640608 (or 2167640597 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 1311422551505 its reverse (5051552241131), we get a palindrome (6362974792636).

The spelling of 1311422551505 in words is "one trillion, three hundred eleven billion, four hundred twenty-two million, five hundred fifty-one thousand, five hundred five".