421556063 has 2 divisors, whose sum is σ = 421556064. Its totient is φ = 421556062.

The previous prime is 421556041. The next prime is 421556071. The reversal of 421556063 is 360655124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421556063 - 2⁶ = 421555999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421556033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210778031 + 210778032.

It is an arithmetic number, because the mean of its divisors is an integer number (210778032).

Almost surely, 2^421556063 is an apocalyptic number.

421556063 is a deficient number, since it is larger than the sum of its proper divisors (1).

421556063 is an equidigital number, since it uses as much as digits as its factorization.

421556063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 421556063 is about 20531.8304834226. The cubic root of 421556063 is about 749.8109526484.

The spelling of 421556063 in words is "four hundred twenty-one million, five hundred fifty-six thousand, sixty-three".