31000103311 has 4 divisors (see below), whose sum is σ = 31030466824. Its totient is φ = 30969739800.

The previous prime is 31000103297. The next prime is 31000103333. The reversal of 31000103311 is 11330100013.

It is a happy number.

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 31000103311 - 2⁹ = 31000102799 is a prime.

It is a super-2 number, since 2×31000103311² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31000103291 and 31000103300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000103371) 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, 15180225 + ... + 15182266.

It is an arithmetic number, because the mean of its divisors is an integer number (7757616706).

Almost surely, 2^31000103311 is an apocalyptic number.

31000103311 is a deficient number, since it is larger than the sum of its proper divisors (30363513).

31000103311 is a wasteful number, since it uses less digits than its factorization.

31000103311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30363512.

The product of its (nonzero) digits is 27, while the sum is 13.

Adding to 31000103311 its reverse (11330100013), we get a palindrome (42330203324).

The spelling of 31000103311 in words is "thirty-one billion, one hundred three thousand, three hundred eleven".