1311513215425 has 18 divisors (see below), whose sum is σ = 1891790901078. Its totient is φ = 899323346880.

The previous prime is 1311513215423. The next prime is 1311513215431. The reversal of 1311513215425 is 5245123151131.

It can be written as a sum of positive squares in 3 ways, for example, as 46239191089 + 1265274024336 = 215033^2 + 1124844^2 .

It is not a de Polignac number, because 1311513215425 - 2¹ = 1311513215423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311513215423) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 535310292 + ... + 535312741.

Almost surely, 2^{1311513215425} is an apocalyptic number.

It is an amenable number.

1311513215425 is a deficient number, since it is larger than the sum of its proper divisors (580277685653).

1311513215425 is a wasteful number, since it uses less digits than its factorization.

1311513215425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070623057 (or 1070623045 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

Adding to 1311513215425 its reverse (5245123151131), we get a palindrome (6556636366556).

The spelling of 1311513215425 in words is "one trillion, three hundred eleven billion, five hundred thirteen million, two hundred fifteen thousand, four hundred twenty-five".