31443052512 has 24 divisors (see below), whose sum is σ = 82538013096. Its totient is φ = 10481017472.

The previous prime is 31443052507. The next prime is 31443052513. The reversal of 31443052512 is 21525034413.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31443052512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31443052513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163765803 + ... + 163765994.

It is an arithmetic number, because the mean of its divisors is an integer number (3439083879).

Almost surely, 2^31443052512 is an apocalyptic number.

31443052512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31443052512 is an abundant number, since it is smaller than the sum of its proper divisors (51094960584).

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

31443052512 is a wasteful number, since it uses less digits than its factorization.

31443052512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327531810 (or 327531802 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 31443052512 its reverse (21525034413), we get a palindrome (52968086925).

The spelling of 31443052512 in words is "thirty-one billion, four hundred forty-three million, fifty-two thousand, five hundred twelve".