31423133423 has 4 divisors (see below), whose sum is σ = 34279781928. Its totient is φ = 28566484920.

The previous prime is 31423133411. The next prime is 31423133431. The reversal of 31423133423 is 32433132413.

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 31423133423 - 2¹² = 31423129327 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 (31423133453) 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, 1428324236 + ... + 1428324257.

It is an arithmetic number, because the mean of its divisors is an integer number (8569945482).

Almost surely, 2^31423133423 is an apocalyptic number.

31423133423 is a deficient number, since it is larger than the sum of its proper divisors (2856648505).

31423133423 is a wasteful number, since it uses less digits than its factorization.

31423133423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856648504.

The product of its digits is 15552, while the sum is 29.

Adding to 31423133423 its reverse (32433132413), we get a palindrome (63856265836).

The spelling of 31423133423 in words is "thirty-one billion, four hundred twenty-three million, one hundred thirty-three thousand, four hundred twenty-three".