221302741 has 8 divisors (see below), whose sum is σ = 249746400. Its totient is φ = 194246640.

The previous prime is 221302721. The next prime is 221302751. The reversal of 221302741 is 147203122.

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

It is not a de Polignac number, because 221302741 - 2¹¹ = 221300693 is a prime.

It is a super-2 number, since 2×221302741² = 97949806348226162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221302721) 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, 346551 + ... + 347188.

It is an arithmetic number, because the mean of its divisors is an integer number (31218300).

Almost surely, 2^221302741 is an apocalyptic number.

It is an amenable number.

221302741 is a deficient number, since it is larger than the sum of its proper divisors (28443659).

221302741 is a wasteful number, since it uses less digits than its factorization.

221302741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693779.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 221302741 is about 14876.2475443238. The cubic root of 221302741 is about 604.8703052820.

Adding to 221302741 its reverse (147203122), we get a palindrome (368505863).

The spelling of 221302741 in words is "two hundred twenty-one million, three hundred two thousand, seven hundred forty-one".