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421880233 = 1993211681
BaseRepresentation
bin11001001001010…
…110000110101001
31002101211201212211
4121021112012221
51331000131413
6105510205121
713311631345
oct3111260651
91071751784
10421880233
111a715a955
12b93537a1
1369532798
144005c625
152708683d
hex192561a9

421880233 has 4 divisors (see below), whose sum is σ = 422093908. Its totient is φ = 421666560.

The previous prime is 421880231. The next prime is 421880273. The reversal of 421880233 is 332088124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 386987584 + 34892649 = 19672^2 + 5907^2 .

It is a cyclic number.

It is not a de Polignac number, because 421880233 - 21 = 421880231 is a prime.

It is a super-2 number, since 2×4218802332 = 355965861992268578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421880195 and 421880204.

It is not an unprimeable number, because it can be changed into a prime (421880231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103848 + ... + 107833.

It is an arithmetic number, because the mean of its divisors is an integer number (105523477).

Almost surely, 2421880233 is an apocalyptic number.

It is an amenable number.

421880233 is a deficient number, since it is larger than the sum of its proper divisors (213675).

421880233 is a wasteful number, since it uses less digits than its factorization.

421880233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213674.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 421880233 is about 20539.7232941440. The cubic root of 421880233 is about 750.0031010242.

The spelling of 421880233 in words is "four hundred twenty-one million, eight hundred eighty thousand, two hundred thirty-three".

Divisors: 1 1993 211681 421880233