31443423432 has 32 divisors (see below), whose sum is σ = 78619507200. Its totient is φ = 10479681344.

The previous prime is 31443423331. The next prime is 31443423433. The reversal of 31443423432 is 23432434413.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31443423393 and 31443423402.

It is not an unprimeable number, because it can be changed into a prime (31443423433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92194 + ... + 267182.

It is an arithmetic number, because the mean of its divisors is an integer number (2456859600).

Almost surely, 2^31443423432 is an apocalyptic number.

It is an amenable number.

31443423432 is an abundant number, since it is smaller than the sum of its proper divisors (47176083768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31443423432 is a wasteful number, since it uses less digits than its factorization.

31443423432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182485 (or 182481 counting only the distinct ones).

The product of its digits is 82944, while the sum is 33.

Adding to 31443423432 its reverse (23432434413), we get a palindrome (54875857845).

The spelling of 31443423432 in words is "thirty-one billion, four hundred forty-three million, four hundred twenty-three thousand, four hundred thirty-two".