221051552 has 24 divisors (see below), whose sum is σ = 443409876. Its totient is φ = 108439552.

The previous prime is 221051539. The next prime is 221051563. The reversal of 221051552 is 255150122.

221051552 is digitally balanced in base 2, 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 2 ways, for example, as 170981776 + 50069776 = 13076^2 + 7076^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63473 + ... + 66864.

Almost surely, 2^221051552 is an apocalyptic number.

It is an amenable number.

221051552 is an abundant number, since it is smaller than the sum of its proper divisors (222358324).

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

221051552 is a wasteful number, since it uses less digits than its factorization.

221051552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130400 (or 130392 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 221051552 is about 14867.8025276098. The cubic root of 221051552 is about 604.6413665775.

The spelling of 221051552 in words is "two hundred twenty-one million, fifty-one thousand, five hundred fifty-two".