221742741 has 8 divisors (see below), whose sum is σ = 322534944. Its totient is φ = 134389520.

The previous prime is 221742737. The next prime is 221742743. The reversal of 221742741 is 147247122.

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

It is a cyclic number.

It is not a de Polignac number, because 221742741 - 2² = 221742737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221742699 and 221742708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221742743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3359706 + ... + 3359771.

It is an arithmetic number, because the mean of its divisors is an integer number (40316868).

Almost surely, 2^221742741 is an apocalyptic number.

It is an amenable number.

221742741 is a deficient number, since it is larger than the sum of its proper divisors (100792203).

221742741 is a wasteful number, since it uses less digits than its factorization.

221742741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719491.

The product of its digits is 6272, while the sum is 30.

The square root of 221742741 is about 14891.0288764746. The cubic root of 221742741 is about 605.2709129798.

Adding to 221742741 its reverse (147247122), we get a palindrome (368989863).

The spelling of 221742741 in words is "two hundred twenty-one million, seven hundred forty-two thousand, seven hundred forty-one".