221150554 has 8 divisors (see below), whose sum is σ = 340691508. Its totient is φ = 107586720.

The previous prime is 221150537. The next prime is 221150563. The reversal of 221150554 is 455051122.

It can be written as a sum of positive squares in 2 ways, for example, as 220968225 + 182329 = 14865^2 + 427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1494187 + ... + 1494334.

Almost surely, 2^221150554 is an apocalyptic number.

221150554 is a deficient number, since it is larger than the sum of its proper divisors (119540954).

221150554 is a wasteful number, since it uses less digits than its factorization.

221150554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988560.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 221150554 is about 14871.1315642086. The cubic root of 221150554 is about 604.7316196877.

The spelling of 221150554 in words is "two hundred twenty-one million, one hundred fifty thousand, five hundred fifty-four".