31440331100220 has 48 divisors (see below), whose sum is σ = 100609059522048. Its totient is φ = 7186361394240.

The previous prime is 31440331100219. The next prime is 31440331100239. The reversal of 31440331100220 is 2200113304413.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37428965176 + ... + 37428966015.

It is an arithmetic number, because the mean of its divisors is an integer number (2096022073376).

Almost surely, 2^{31440331100220} is an apocalyptic number.

31440331100220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31440331100220 is an abundant number, since it is smaller than the sum of its proper divisors (69168728421828).

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

31440331100220 is a wasteful number, since it uses less digits than its factorization.

31440331100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74857931210 (or 74857931208 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31440331100220 its reverse (2200113304413), we get a palindrome (33640444404633).

The spelling of 31440331100220 in words is "thirty-one trillion, four hundred forty billion, three hundred thirty-one million, one hundred thousand, two hundred twenty".