1311030231 has 24 divisors (see below), whose sum is σ = 2103559920. Its totient is φ = 723324672.

The previous prime is 1311030223. The next prime is 1311030257. The reversal of 1311030231 is 1320301131.

It is not a de Polignac number, because 1311030231 - 2³ = 1311030223 is a prime.

It is a super-2 number, since 2×1311030231² = 3437600533191826722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1311030231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311030211) 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, 149506 + ... + 158031.

It is an arithmetic number, because the mean of its divisors is an integer number (87648330).

Almost surely, 2^1311030231 is an apocalyptic number.

1311030231 is a deficient number, since it is larger than the sum of its proper divisors (792529689).

1311030231 is a wasteful number, since it uses less digits than its factorization.

1311030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307583 (or 307576 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1311030231 is about 36208.1514441155. The cubic root of 1311030231 is about 1094.4709414363.

Adding to 1311030231 its reverse (1320301131), we get a palindrome (2631331362).

The spelling of 1311030231 in words is "one billion, three hundred eleven million, thirty thousand, two hundred thirty-one".