31234423 has 32 divisors (see below), whose sum is σ = 38880000. Its totient is φ = 24721920.

The previous prime is 31234417. The next prime is 31234433. The reversal of 31234423 is 32443213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31234423 - 2⁹ = 31233911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31234394 and 31234403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209553 + ... + 209701.

It is an arithmetic number, because the mean of its divisors is an integer number (1215000).

Almost surely, 2^31234423 is an apocalyptic number.

31234423 is a deficient number, since it is larger than the sum of its proper divisors (7645577).

31234423 is a wasteful number, since it uses less digits than its factorization.

31234423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its digits is 1728, while the sum is 22.

The square root of 31234423 is about 5588.7765208496. The cubic root of 31234423 is about 314.9279183350.

Adding to 31234423 its reverse (32443213), we get a palindrome (63677636).

The spelling of 31234423 in words is "thirty-one million, two hundred thirty-four thousand, four hundred twenty-three".