221033053450 has 36 divisors (see below), whose sum is σ = 451893869910. Its totient is φ = 80375653600.

The previous prime is 221033053421. The next prime is 221033053523. The reversal of 221033053450 is 54350330122.

It can be written as a sum of positive squares in 3 ways, for example, as 179902374201 + 41130679249 = 424149^2 + 202807^2 .

It is a super-2 number, since 2×221033053450² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18261145 + ... + 18273244.

Almost surely, 2^221033053450 is an apocalyptic number.

221033053450 is an abundant number, since it is smaller than the sum of its proper divisors (230860816460).

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

221033053450 is a wasteful number, since it uses less digits than its factorization.

221033053450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36534423 (or 36534407 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 221033053450 its reverse (54350330122), we get a palindrome (275383383572).

The spelling of 221033053450 in words is "two hundred twenty-one billion, thirty-three million, fifty-three thousand, four hundred fifty".