221062417 has 4 divisors (see below), whose sum is σ = 225233460. Its totient is φ = 216891376.

The previous prime is 221062399. The next prime is 221062421. The reversal of 221062417 is 714260122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202322176 + 18740241 = 14224^2 + 4329^2 .

It is a cyclic number.

It is not a de Polignac number, because 221062417 - 2¹¹ = 221060369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221062391 and 221062400.

It is not an unprimeable number, because it can be changed into a prime (221062487) 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, 2085442 + ... + 2085547.

It is an arithmetic number, because the mean of its divisors is an integer number (56308365).

Almost surely, 2^221062417 is an apocalyptic number.

It is an amenable number.

221062417 is a deficient number, since it is larger than the sum of its proper divisors (4171043).

221062417 is an equidigital number, since it uses as much as digits as its factorization.

221062417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171042.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 221062417 is about 14868.1679100016. The cubic root of 221062417 is about 604.6512727446.

The spelling of 221062417 in words is "two hundred twenty-one million, sixty-two thousand, four hundred seventeen".