220006541 has 2 divisors, whose sum is σ = 220006542. Its totient is φ = 220006540.

The previous prime is 220006517. The next prime is 220006561. The reversal of 220006541 is 145600022.

It is a happy number.

It is an a-pointer prime, because the next prime (220006561) can be obtained adding 220006541 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145684900 + 74321641 = 12070^2 + 8621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220006541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220006511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110003270 + 110003271.

It is an arithmetic number, because the mean of its divisors is an integer number (110003271).

Almost surely, 2^220006541 is an apocalyptic number.

It is an amenable number.

220006541 is a deficient number, since it is larger than the sum of its proper divisors (1).

220006541 is an equidigital number, since it uses as much as digits as its factorization.

220006541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 220006541 is about 14832.6174696174. The cubic root of 220006541 is about 603.6870564658.

Adding to 220006541 its reverse (145600022), we get a palindrome (365606563).

The spelling of 220006541 in words is "two hundred twenty million, six thousand, five hundred forty-one".