31433232012 has 96 divisors (see below), whose sum is σ = 90491788800. Its totient is φ = 8269696512.

The previous prime is 31433231983. The next prime is 31433232013. The reversal of 31433232012 is 21023233413.

It is not an unprimeable number, because it can be changed into a prime (31433232013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411439 + ... + 481817.

It is an arithmetic number, because the mean of its divisors is an integer number (942622800).

Almost surely, 2^31433232012 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 31433232012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45245894400).

31433232012 is an abundant number, since it is smaller than the sum of its proper divisors (59058556788).

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

31433232012 is a wasteful number, since it uses less digits than its factorization.

31433232012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70815 (or 70813 counting only the distinct ones).

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

Adding to 31433232012 its reverse (21023233413), we get a palindrome (52456465425).

The spelling of 31433232012 in words is "thirty-one billion, four hundred thirty-three million, two hundred thirty-two thousand, twelve".