31404221344 has 48 divisors (see below), whose sum is σ = 64598361408. Its totient is φ = 15000049152.

The previous prime is 31404221311. The next prime is 31404221377. The reversal of 31404221344 is 44312240413.

It is an interprime number because it is at equal distance from previous prime (31404221311) and next prime (31404221377).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 552124 + ... + 606340.

It is an arithmetic number, because the mean of its divisors is an integer number (1345799196).

Almost surely, 2^31404221344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31404221344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32299180704).

31404221344 is an abundant number, since it is smaller than the sum of its proper divisors (33194140064).

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

31404221344 is a wasteful number, since it uses less digits than its factorization.

31404221344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55037 (or 55029 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31404221344 its reverse (44312240413), we get a palindrome (75716461757).

The spelling of 31404221344 in words is "thirty-one billion, four hundred four million, two hundred twenty-one thousand, three hundred forty-four".