31404404323 has 4 divisors (see below), whose sum is σ = 31562215600. Its totient is φ = 31246593048.

The previous prime is 31404404303. The next prime is 31404404333. The reversal of 31404404323 is 32340440413.

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 31404404323 - 2³³ = 22814469731 is a prime.

It is a super-2 number, since 2×31404404323² (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 = 31404404291 and 31404404300.

It is not an unprimeable number, because it can be changed into a prime (31404404303) 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, 78905340 + ... + 78905737.

It is an arithmetic number, because the mean of its divisors is an integer number (7890553900).

Almost surely, 2^31404404323 is an apocalyptic number.

31404404323 is a deficient number, since it is larger than the sum of its proper divisors (157811277).

31404404323 is a wasteful number, since it uses less digits than its factorization.

31404404323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157811276.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31404404323 its reverse (32340440413), we get a palindrome (63744844736).

The spelling of 31404404323 in words is "thirty-one billion, four hundred four million, four hundred four thousand, three hundred twenty-three".