221277450752 has 30 divisors (see below), whose sum is σ = 442143987153. Its totient is φ = 110633403392.

The previous prime is 221277450553. The next prime is 221277450781. The reversal of 221277450752 is 257054772122.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 181666898176 + 39610552576 = 426224^2 + 199024^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332624.

It is a super-2 number, since 2×221277450752² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10633574 + ... + 10654362.

Almost surely, 2^221277450752 is an apocalyptic number.

It is an amenable number.

221277450752 is a deficient number, since it is larger than the sum of its proper divisors (220866536401).

221277450752 is an frugal number, since it uses more digits than its factorization.

221277450752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41596 (or 20791 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 44.

The spelling of 221277450752 in words is "two hundred twenty-one billion, two hundred seventy-seven million, four hundred fifty thousand, seven hundred fifty-two".