31421332032 has 112 divisors (see below), whose sum is σ = 88100611200. Its totient is φ = 9865891840.

The previous prime is 31421332031. The next prime is 31421332037. The reversal of 31421332032 is 23023312413.

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

It is a junction number, because it is equal to n+sod(n) for n = 31421331993 and 31421332011.

It is not an unprimeable number, because it can be changed into a prime (31421332031) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 159469 + ... + 297107.

It is an arithmetic number, because the mean of its divisors is an integer number (786612600).

Almost surely, 2^31421332032 is an apocalyptic number.

31421332032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31421332032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44050305600).

31421332032 is an abundant number, since it is smaller than the sum of its proper divisors (56679279168).

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

31421332032 is a wasteful number, since it uses less digits than its factorization.

31421332032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137724 (or 137714 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31421332032 its reverse (23023312413), we get a palindrome (54444644445).

The spelling of 31421332032 in words is "thirty-one billion, four hundred twenty-one million, three hundred thirty-two thousand, thirty-two".