311312131003 has 4 divisors (see below), whose sum is σ = 311314420048. Its totient is φ = 311309841960.

The previous prime is 311312130959. The next prime is 311312131007. The reversal of 311312131003 is 300131213113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300131213113 = 73 ⋅4111386481.

It is a cyclic number.

It is not a de Polignac number, because 311312131003 - 2²¹ = 311310033851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311312131007) 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, 926703 + ... + 1217128.

It is an arithmetic number, because the mean of its divisors is an integer number (77828605012).

Almost surely, 2^311312131003 is an apocalyptic number.

311312131003 is a deficient number, since it is larger than the sum of its proper divisors (2289045).

311312131003 is a wasteful number, since it uses less digits than its factorization.

311312131003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289044.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 311312131003 its reverse (300131213113), we get a palindrome (611443344116).

The spelling of 311312131003 in words is "three hundred eleven billion, three hundred twelve million, one hundred thirty-one thousand, three".