221102542 has 8 divisors (see below), whose sum is σ = 346073616. Its totient is φ = 105744672.

The previous prime is 221102521. The next prime is 221102549. The reversal of 221102542 is 245201122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2403243 + ... + 2403334.

It is an arithmetic number, because the mean of its divisors is an integer number (43259202).

Almost surely, 2^221102542 is an apocalyptic number.

221102542 is a deficient number, since it is larger than the sum of its proper divisors (124971074).

221102542 is a wasteful number, since it uses less digits than its factorization.

221102542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806602.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 221102542 is about 14869.5172080334. The cubic root of 221102542 is about 604.6878539130.

Adding to 221102542 its reverse (245201122), we get a palindrome (466303664).

The spelling of 221102542 in words is "two hundred twenty-one million, one hundred two thousand, five hundred forty-two".