1311311031 has 8 divisors (see below), whose sum is σ = 1851262704. Its totient is φ = 822783360.

The previous prime is 1311310993. The next prime is 1311311051. The reversal of 1311311031 is 1301131131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311311031 - 2¹⁵ = 1311278263 is a prime.

It is a super-2 number, since 2×1311311031² = 3439073240044565922, 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 1311311031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311311051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12855940 + ... + 12856041.

It is an arithmetic number, because the mean of its divisors is an integer number (231407838).

Almost surely, 2^1311311031 is an apocalyptic number.

1311311031 is a deficient number, since it is larger than the sum of its proper divisors (539951673).

1311311031 is a wasteful number, since it uses less digits than its factorization.

1311311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25712001.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 1311311031 is about 36212.0288164030. The cubic root of 1311311031 is about 1094.5490747735.

Adding to 1311311031 its reverse (1301131131), we get a palindrome (2612442162).

The spelling of 1311311031 in words is "one billion, three hundred eleven million, three hundred eleven thousand, thirty-one".