221550542 has 8 divisors (see below), whose sum is σ = 332466096. Its totient is φ = 110728512.

The previous prime is 221550529. The next prime is 221550551. The reversal of 221550542 is 245055122.

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

It is a congruent number.

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, 17123 + ... + 27134.

It is an arithmetic number, because the mean of its divisors is an integer number (41558262).

Almost surely, 2^221550542 is an apocalyptic number.

221550542 is a deficient number, since it is larger than the sum of its proper divisors (110915554).

221550542 is a wasteful number, since it uses less digits than its factorization.

221550542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46762.

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

The square root of 221550542 is about 14884.5739609839. The cubic root of 221550542 is about 605.0959864097.

The spelling of 221550542 in words is "two hundred twenty-one million, five hundred fifty thousand, five hundred forty-two".