221185656050 has 54 divisors (see below), whose sum is σ = 414640802343. Its totient is φ = 87783878240.

The previous prime is 221185655981. The next prime is 221185656071. The reversal of 221185656050 is 50656581122.

221185656050 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 191344130041 + 29841526009 = 437429^2 + 172747^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332555.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221185655989 and 221185656007.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 754899704 + ... + 754899996.

Almost surely, 2^221185656050 is an apocalyptic number.

221185656050 is a deficient number, since it is larger than the sum of its proper divisors (193455146293).

221185656050 is an frugal number, since it uses more digits than its factorization.

221185656050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 221185656050 in words is "two hundred twenty-one billion, one hundred eighty-five million, six hundred fifty-six thousand, fifty".