221283032790 has 96 divisors (see below), whose sum is σ = 561883620960. Its totient is φ = 55765283328.

The previous prime is 221283032783. The next prime is 221283032807. The reversal of 221283032790 is 97230382122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4404492 + ... + 4454448.

It is an arithmetic number, because the mean of its divisors is an integer number (5852954385).

Almost surely, 2^221283032790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221283032790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280941810480).

221283032790 is an abundant number, since it is smaller than the sum of its proper divisors (340600588170).

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

221283032790 is a wasteful number, since it uses less digits than its factorization.

221283032790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50414 (or 50395 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 221283032790 in words is "two hundred twenty-one billion, two hundred eighty-three million, thirty-two thousand, seven hundred ninety".