31404031215424 has 56 divisors (see below), whose sum is σ = 72956926219968. Its totient is φ = 13130605378560.

The previous prime is 31404031215377. The next prime is 31404031215449. The reversal of 31404031215424 is 42451213040413.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 31404031215424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854838754 + ... + 854875489.

It is an arithmetic number, because the mean of its divisors is an integer number (1302802253928).

Almost surely, 2^{31404031215424} is an apocalyptic number.

It is an amenable number.

31404031215424 is an abundant number, since it is smaller than the sum of its proper divisors (41552895004544).

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

31404031215424 is a wasteful number, since it uses less digits than its factorization.

31404031215424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709714303 (or 1709714293 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 31404031215424 its reverse (42451213040413), we get a palindrome (73855244255837).

The spelling of 31404031215424 in words is "thirty-one trillion, four hundred four billion, thirty-one million, two hundred fifteen thousand, four hundred twenty-four".