420218281 has 8 divisors (see below), whose sum is σ = 481175424. Its totient is φ = 359492640.

The previous prime is 420218261. The next prime is 420218297. The reversal of 420218281 is 182812024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420218281 - 2⁷ = 420218153 is a prime.

It is a super-2 number, since 2×420218281² = 353166807373189922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420218221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53965 + ... + 61258.

It is an arithmetic number, because the mean of its divisors is an integer number (60146928).

Almost surely, 2^420218281 is an apocalyptic number.

It is an amenable number.

420218281 is a deficient number, since it is larger than the sum of its proper divisors (60957143).

420218281 is a wasteful number, since it uses less digits than its factorization.

420218281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115751.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 420218281 is about 20499.2263512553. The cubic root of 420218281 is about 749.0169526461.

The spelling of 420218281 in words is "four hundred twenty million, two hundred eighteen thousand, two hundred eighty-one".