1311513215442 has 32 divisors (see below), whose sum is σ = 2654213572608. Its totient is φ = 431991551376.

The previous prime is 1311513215431. The next prime is 1311513215443. The reversal of 1311513215442 is 2445123151131.

It is not an unprimeable number, because it can be changed into a prime (1311513215443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2005648 + ... + 2577915.

It is an arithmetic number, because the mean of its divisors is an integer number (82944174144).

Almost surely, 2^{1311513215442} is an apocalyptic number.

1311513215442 is an abundant number, since it is smaller than the sum of its proper divisors (1342700357166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311513215442 is a wasteful number, since it uses less digits than its factorization.

1311513215442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584134.

The product of its digits is 14400, while the sum is 33.

Adding to 1311513215442 its reverse (2445123151131), we get a palindrome (3756636366573).

The spelling of 1311513215442 in words is "one trillion, three hundred eleven billion, five hundred thirteen million, two hundred fifteen thousand, four hundred forty-two".