31404403424 has 12 divisors (see below), whose sum is σ = 61827419304. Its totient is φ = 15702201696.

The previous prime is 31404403421. The next prime is 31404403439. The reversal of 31404403424 is 42430440413.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404403421) 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 as a sum of consecutive naturals, namely, 490693772 + ... + 490693835.

It is an arithmetic number, because the mean of its divisors is an integer number (5152284942).

Almost surely, 2^31404403424 is an apocalyptic number.

It is an amenable number.

31404403424 is a deficient number, since it is larger than the sum of its proper divisors (30423015880).

31404403424 is an equidigital number, since it uses as much as digits as its factorization.

31404403424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981387617 (or 981387609 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 31404403424 its reverse (42430440413), we get a palindrome (73834843837).

The spelling of 31404403424 in words is "thirty-one billion, four hundred four million, four hundred three thousand, four hundred twenty-four".