311312103 has 4 divisors (see below), whose sum is σ = 415082808. Its totient is φ = 207541400.

The previous prime is 311312101. The next prime is 311312171. The reversal of 311312103 is 301213113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311312103 - 2¹ = 311312101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311312101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51885348 + ... + 51885353.

It is an arithmetic number, because the mean of its divisors is an integer number (103770702).

Almost surely, 2^311312103 is an apocalyptic number.

311312103 is a deficient number, since it is larger than the sum of its proper divisors (103770705).

311312103 is a wasteful number, since it uses less digits than its factorization.

311312103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103770704.

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

The square root of 311312103 is about 17644.0387383388. The cubic root of 311312103 is about 677.7434593859.

Adding to 311312103 its reverse (301213113), we get a palindrome (612525216).

The spelling of 311312103 in words is "three hundred eleven million, three hundred twelve thousand, one hundred three".