221514542 has 8 divisors (see below), whose sum is σ = 334012032. Its totient is φ = 110177200.

The previous prime is 221514493. The next prime is 221514547. The reversal of 221514542 is 245415122.

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 (221514547) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 289559 + ... + 290322.

It is an arithmetic number, because the mean of its divisors is an integer number (41751504).

Almost surely, 2^221514542 is an apocalyptic number.

221514542 is a deficient number, since it is larger than the sum of its proper divisors (112497490).

221514542 is a wasteful number, since it uses less digits than its factorization.

221514542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580074.

The product of its digits is 3200, while the sum is 26.

The square root of 221514542 is about 14883.3646061635. The cubic root of 221514542 is about 605.0632103889.

Adding to 221514542 its reverse (245415122), we get a palindrome (466929664).

The spelling of 221514542 in words is "two hundred twenty-one million, five hundred fourteen thousand, five hundred forty-two".