31431112334220 has 24 divisors (see below), whose sum is σ = 88007114535984. Its totient is φ = 8381629955776.

The previous prime is 31431112334189. The next prime is 31431112334231. The reversal of 31431112334220 is 2243321113413.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 261925936059 + ... + 261925936178.

It is an arithmetic number, because the mean of its divisors is an integer number (3666963105666).

Almost surely, 2^{31431112334220} is an apocalyptic number.

31431112334220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31431112334220 is an abundant number, since it is smaller than the sum of its proper divisors (56576002201764).

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

31431112334220 is a wasteful number, since it uses less digits than its factorization.

31431112334220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523851872249 (or 523851872247 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 31431112334220 its reverse (2243321113413), we get a palindrome (33674433447633).

The spelling of 31431112334220 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred twelve million, three hundred thirty-four thousand, two hundred twenty".