221533660250650 has 96 divisors (see below), whose sum is σ = 478369827853632. Its totient is φ = 75434138035200.

The previous prime is 221533660250621. The next prime is 221533660250663. The reversal of 221533660250650 is 56052066335122.

It is a self number, because there is not a number n which added to its sum of digits gives 221533660250650.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58293684 + ... + 61977583.

It is an arithmetic number, because the mean of its divisors is an integer number (4983019040142).

Almost surely, 2^{221533660250650} is an apocalyptic number.

221533660250650 is an abundant number, since it is smaller than the sum of its proper divisors (256836167602982).

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

221533660250650 is a wasteful number, since it uses less digits than its factorization.

221533660250650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120271504 (or 120271499 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 221533660250650 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred sixty million, two hundred fifty thousand, six hundred fifty".