1311513215345 has 32 divisors (see below), whose sum is σ = 1630541352960. Its totient is φ = 1012076432640.

The previous prime is 1311513215249. The next prime is 1311513215377. The reversal of 1311513215345 is 5435123151131.

It is not a de Polignac number, because 1311513215345 - 2³⁴ = 1294333346161 is a prime.

It is a Curzon number.

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, 37792592 + ... + 37827278.

It is an arithmetic number, because the mean of its divisors is an integer number (50954417280).

Almost surely, 2^{1311513215345} is an apocalyptic number.

It is an amenable number.

1311513215345 is a deficient number, since it is larger than the sum of its proper divisors (319028137615).

1311513215345 is a wasteful number, since it uses less digits than its factorization.

1311513215345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37145.

The product of its digits is 27000, while the sum is 35.

Adding to 1311513215345 its reverse (5435123151131), we get a palindrome (6746636366476).

The spelling of 1311513215345 in words is "one trillion, three hundred eleven billion, five hundred thirteen million, two hundred fifteen thousand, three hundred forty-five".