420551163 has 32 divisors (see below), whose sum is σ = 635980800. Its totient is φ = 274606848.

The previous prime is 420551107. The next prime is 420551171. The reversal of 420551163 is 361155024.

It is not a de Polignac number, because 420551163 - 2¹⁰ = 420550139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (420556163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268978 + ... + 270536.

It is an arithmetic number, because the mean of its divisors is an integer number (19874400).

Almost surely, 2^420551163 is an apocalyptic number.

420551163 is a deficient number, since it is larger than the sum of its proper divisors (215429637).

420551163 is a wasteful number, since it uses less digits than its factorization.

420551163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768 (or 1762 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 420551163 is about 20507.3441235085. The cubic root of 420551163 is about 749.2146819878.

The spelling of 420551163 in words is "four hundred twenty million, five hundred fifty-one thousand, one hundred sixty-three".