1311519948 has 12 divisors (see below), whose sum is σ = 3060213240. Its totient is φ = 437173312.

The previous prime is 1311519943. The next prime is 1311519949. The reversal of 1311519948 is 8499151131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1311519941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54646653 + ... + 54646676.

It is an arithmetic number, because the mean of its divisors is an integer number (255017770).

Almost surely, 2^1311519948 is an apocalyptic number.

It is an amenable number.

1311519948 is an abundant number, since it is smaller than the sum of its proper divisors (1748693292).

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

1311519948 is a wasteful number, since it uses less digits than its factorization.

1311519948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109293336 (or 109293334 counting only the distinct ones).

The product of its digits is 38880, while the sum is 42.

The square root of 1311519948 is about 36214.9133369114. The cubic root of 1311519948 is about 1094.6071992410.

The spelling of 1311519948 in words is "one billion, three hundred eleven million, five hundred nineteen thousand, nine hundred forty-eight".