31433212142420 has 96 divisors (see below), whose sum is σ = 74500393524480. Its totient is φ = 11035128867840.

The previous prime is 31433212142407. The next prime is 31433212142447. The reversal of 31433212142420 is 2424121233413.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73328552 + ... + 73755968.

It is an arithmetic number, because the mean of its divisors is an integer number (776045765880).

Almost surely, 2^{31433212142420} 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 31433212142420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37250196762240).

31433212142420 is an abundant number, since it is smaller than the sum of its proper divisors (43067181382060).

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

31433212142420 is a wasteful number, since it uses less digits than its factorization.

31433212142420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438993 (or 438991 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 31433212142420 its reverse (2424121233413), we get a palindrome (33857333375833).

The spelling of 31433212142420 in words is "thirty-one trillion, four hundred thirty-three billion, two hundred twelve million, one hundred forty-two thousand, four hundred twenty".