1311103215 has 24 divisors (see below), whose sum is σ = 2280358080. Its totient is φ = 696861504.

The previous prime is 1311103187. The next prime is 1311103217. The reversal of 1311103215 is 5123011131.

It is not a de Polignac number, because 1311103215 - 2³⁰ = 237361391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311103217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36535 + ... + 62904.

It is an arithmetic number, because the mean of its divisors is an integer number (95014920).

Almost surely, 2^1311103215 is an apocalyptic number.

1311103215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311103215 is a deficient number, since it is larger than the sum of its proper divisors (969254865).

1311103215 is a wasteful number, since it uses less digits than its factorization.

1311103215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99743 (or 99740 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1311103215 is about 36209.1592694445. The cubic root of 1311103215 is about 1094.4912504988.

Adding to 1311103215 its reverse (5123011131), we get a palindrome (6434114346).

The spelling of 1311103215 in words is "one billion, three hundred eleven million, one hundred three thousand, two hundred fifteen".