31343420355420 has 24 divisors (see below), whose sum is σ = 87761576995344. Its totient is φ = 8358245428096.

The previous prime is 31343420355419. The next prime is 31343420355491. The reversal of 31343420355420 is 2455302434313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261195169569 + ... + 261195169688.

It is an arithmetic number, because the mean of its divisors is an integer number (3656732374806).

Almost surely, 2^{31343420355420} is an apocalyptic number.

31343420355420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31343420355420 is an abundant number, since it is smaller than the sum of its proper divisors (56418156639924).

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

31343420355420 is a wasteful number, since it uses less digits than its factorization.

31343420355420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522390339269 (or 522390339267 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 39.

Adding to 31343420355420 its reverse (2455302434313), we get a palindrome (33798722789733).

The spelling of 31343420355420 in words is "thirty-one trillion, three hundred forty-three billion, four hundred twenty million, three hundred fifty-five thousand, four hundred twenty".