221317241 has 16 divisors (see below), whose sum is σ = 234524160. Its totient is φ = 208528320.

The previous prime is 221317223. The next prime is 221317249. The reversal of 221317241 is 142713122.

It is a cyclic number.

It is not a de Polignac number, because 221317241 - 2⁶ = 221317177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221317249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477776 + ... + 478238.

It is an arithmetic number, because the mean of its divisors is an integer number (14657760).

Almost surely, 2^221317241 is an apocalyptic number.

It is an amenable number.

221317241 is a deficient number, since it is larger than the sum of its proper divisors (13206919).

221317241 is a wasteful number, since it uses less digits than its factorization.

221317241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856.

The product of its digits is 672, while the sum is 23.

The square root of 221317241 is about 14876.7348904254. The cubic root of 221317241 is about 604.8835155837.

The spelling of 221317241 in words is "two hundred twenty-one million, three hundred seventeen thousand, two hundred forty-one".