31403104331 has 4 divisors (see below), whose sum is σ = 31454839872. Its totient is φ = 31351368792.

The previous prime is 31403104301. The next prime is 31403104333. The reversal of 31403104331 is 13340130413.

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 31403104331 - 2⁶ = 31403104267 is a prime.

It is a super-2 number, since 2×31403104331² (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 = 31403104297 and 31403104306.

It is not an unprimeable number, because it can be changed into a prime (31403104333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25866860 + ... + 25868073.

It is an arithmetic number, because the mean of its divisors is an integer number (7863709968).

Almost surely, 2^31403104331 is an apocalyptic number.

31403104331 is a deficient number, since it is larger than the sum of its proper divisors (51735541).

31403104331 is an equidigital number, since it uses as much as digits as its factorization.

31403104331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51735540.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31403104331 its reverse (13340130413), we get a palindrome (44743234744).

The spelling of 31403104331 in words is "thirty-one billion, four hundred three million, one hundred four thousand, three hundred thirty-one".