221055542 has 4 divisors (see below), whose sum is σ = 331583316. Its totient is φ = 110527770.

The previous prime is 221055533. The next prime is 221055577. The reversal of 221055542 is 245550122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55263884 + ... + 55263887.

It is an arithmetic number, because the mean of its divisors is an integer number (82895829).

Almost surely, 2^221055542 is an apocalyptic number.

221055542 is a deficient number, since it is larger than the sum of its proper divisors (110527774).

221055542 is a wasteful number, since it uses less digits than its factorization.

221055542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110527773.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 221055542 is about 14867.9367095774. The cubic root of 221055542 is about 604.6450044989.

The spelling of 221055542 in words is "two hundred twenty-one million, fifty-five thousand, five hundred forty-two".