31033200220 has 24 divisors (see below), whose sum is σ = 71094241008. Its totient is φ = 11284800000.

The previous prime is 31033200199. The next prime is 31033200221. The reversal of 31033200220 is 2200233013.

It is a junction number, because it is equal to n+sod(n) for n = 31033200194 and 31033200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033200221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70529781 + ... + 70530220.

It is an arithmetic number, because the mean of its divisors is an integer number (2962260042).

Almost surely, 2^31033200220 is an apocalyptic number.

It is an amenable number.

31033200220 is an abundant number, since it is smaller than the sum of its proper divisors (40061040788).

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

31033200220 is a wasteful number, since it uses less digits than its factorization.

31033200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141060021 (or 141060019 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 31033200220 its reverse (2200233013), we get a palindrome (33233433233).

The spelling of 31033200220 in words is "thirty-one billion, thirty-three million, two hundred thousand, two hundred twenty".