221051051650 has 48 divisors (see below), whose sum is σ = 483035208768. Its totient is φ = 74198952000.

The previous prime is 221051051621. The next prime is 221051051677. The reversal of 221051051650 is 56150150122.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15450966 + ... + 15465265.

It is an arithmetic number, because the mean of its divisors is an integer number (10063233516).

Almost surely, 2^221051051650 is an apocalyptic number.

221051051650 is an abundant number, since it is smaller than the sum of its proper divisors (261984157118).

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

221051051650 is a wasteful number, since it uses less digits than its factorization.

221051051650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30916267 (or 30916262 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 221051051650 in words is "two hundred twenty-one billion, fifty-one million, fifty-one thousand, six hundred fifty".