31403243423 has 4 divisors (see below), whose sum is σ = 31407742368. Its totient is φ = 31398744480.

The previous prime is 31403243411. The next prime is 31403243471. The reversal of 31403243423 is 32434230413.

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 31403243423 - 2²⁰ = 31402194847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403243483) 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, 2238986 + ... + 2252967.

It is an arithmetic number, because the mean of its divisors is an integer number (7851935592).

Almost surely, 2^31403243423 is an apocalyptic number.

31403243423 is a deficient number, since it is larger than the sum of its proper divisors (4498945).

31403243423 is an equidigital number, since it uses as much as digits as its factorization.

31403243423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4498944.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 31403243423 its reverse (32434230413), we get a palindrome (63837473836).

The spelling of 31403243423 in words is "thirty-one billion, four hundred three million, two hundred forty-three thousand, four hundred twenty-three".