601221563 has 2 divisors, whose sum is σ = 601221564. Its totient is φ = 601221562.

The previous prime is 601221497. The next prime is 601221641. The reversal of 601221563 is 365122106.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 601221563 - 2¹⁴ = 601205179 is a prime.

It is a super-2 number, since 2×601221563² = 722934735632325938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (601221163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300610781 + 300610782.

It is an arithmetic number, because the mean of its divisors is an integer number (300610782).

Almost surely, 2^601221563 is an apocalyptic number.

601221563 is a deficient number, since it is larger than the sum of its proper divisors (1).

601221563 is an equidigital number, since it uses as much as digits as its factorization.

601221563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 601221563 is about 24519.8197995010. The cubic root of 601221563 is about 844.0046695870.

Adding to 601221563 its reverse (365122106), we get a palindrome (966343669).

The spelling of 601221563 in words is "six hundred one million, two hundred twenty-one thousand, five hundred sixty-three".