31443423 has 48 divisors (see below), whose sum is σ = 50050560. Its totient is φ = 17487360.

The previous prime is 31443409. The next prime is 31443443. The reversal of 31443423 is 32434413.

It is not a de Polignac number, because 31443423 - 2⁴ = 31443407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31443393 and 31443402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31443443) 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 47 ways as a sum of consecutive naturals, for example, 324111 + ... + 324207.

It is an arithmetic number, because the mean of its divisors is an integer number (1042720).

Almost surely, 2^31443423 is an apocalyptic number.

31443423 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31443423 is a deficient number, since it is larger than the sum of its proper divisors (18607137).

31443423 is a wasteful number, since it uses less digits than its factorization.

31443423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 177 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 31443423 is about 5607.4435351593. The cubic root of 31443423 is about 315.6287868447.

Adding to 31443423 its reverse (32434413), we get a palindrome (63877836).

The spelling of 31443423 in words is "thirty-one million, four hundred forty-three thousand, four hundred twenty-three".