33031222420 has 48 divisors (see below), whose sum is σ = 80892806400. Its totient is φ = 11324988192.

The previous prime is 33031222387. The next prime is 33031222421. The reversal of 33031222420 is 2422213033.

It is a junction number, because it is equal to n+sod(n) for n = 33031222391 and 33031222400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33031222421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2400664 + ... + 2414383.

It is an arithmetic number, because the mean of its divisors is an integer number (1685266800).

Almost surely, 2^33031222420 is an apocalyptic number.

It is an amenable number.

33031222420 is an abundant number, since it is smaller than the sum of its proper divisors (47861583980).

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

33031222420 is a wasteful number, since it uses less digits than its factorization.

33031222420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815077 (or 4815061 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 33031222420 its reverse (2422213033), we get a palindrome (35453435453).

The spelling of 33031222420 in words is "thirty-three billion, thirty-one million, two hundred twenty-two thousand, four hundred twenty".