31310123403 has 8 divisors (see below), whose sum is σ = 44958125968. Its totient is φ = 19267768224.

The previous prime is 31310123401. The next prime is 31310123447. The reversal of 31310123403 is 30432101313.

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

It is not a de Polignac number, because 31310123403 - 2¹ = 31310123401 is a prime.

It is a super-2 number, since 2×31310123403² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31310123403.

It is not an unprimeable number, because it can be changed into a prime (31310123401) 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 7 ways as a sum of consecutive naturals, for example, 401411800 + ... + 401411877.

It is an arithmetic number, because the mean of its divisors is an integer number (5619765746).

Almost surely, 2^31310123403 is an apocalyptic number.

31310123403 is a deficient number, since it is larger than the sum of its proper divisors (13648002565).

31310123403 is a wasteful number, since it uses less digits than its factorization.

31310123403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802823693.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31310123403 its reverse (30432101313), we get a palindrome (61742224716).

The spelling of 31310123403 in words is "thirty-one billion, three hundred ten million, one hundred twenty-three thousand, four hundred three".