31440230016 has 256 divisors, whose sum is σ = 91763280000. Its totient is φ = 9536077824.

The previous prime is 31440229999. The next prime is 31440230033. The reversal of 31440230016 is 61003204413.

It is an interprime number because it is at equal distance from previous prime (31440229999) and next prime (31440230033).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 31 ways as a sum of consecutive naturals, for example, 70022560 + ... + 70023008.

Almost surely, 2^31440230016 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 31440230016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45881640000).

31440230016 is an abundant number, since it is smaller than the sum of its proper divisors (60323049984).

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

31440230016 is an equidigital number, since it uses as much as digits as its factorization.

31440230016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31440230016 its reverse (61003204413), we get a palindrome (92443434429).

The spelling of 31440230016 in words is "thirty-one billion, four hundred forty million, two hundred thirty thousand, sixteen".