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230030221 = 3710957037
BaseRepresentation
bin11011011010111…
…11101110001101
3121000211202010211
431231133232031
5432341431341
634454202421
75462140021
oct1555375615
9530752124
10230030221
11108934123
1265053411
133886cc75
142279c381
15152dc181
hexdb5fb8d

230030221 has 8 divisors (see below), whose sum is σ = 238418840. Its totient is φ = 221755968.

The previous prime is 230030197. The next prime is 230030231. The reversal of 230030221 is 122030032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44689225 + 185340996 = 6685^2 + 13614^2 .

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 230030221 - 213 = 230022029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230030231) 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 in 7 ways as a sum of consecutive naturals, for example, 24486 + ... + 32551.

It is an arithmetic number, because the mean of its divisors is an integer number (29802355).

Almost surely, 2230030221 is an apocalyptic number.

It is an amenable number.

230030221 is a deficient number, since it is larger than the sum of its proper divisors (8388619).

230030221 is a wasteful number, since it uses less digits than its factorization.

230030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57183.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 230030221 is about 15166.7472122403. The cubic root of 230030221 is about 612.7194013941.

Adding to 230030221 its reverse (122030032), we get a palindrome (352060253).

The spelling of 230030221 in words is "two hundred thirty million, thirty thousand, two hundred twenty-one".

Divisors: 1 37 109 4033 57037 2110369 6217033 230030221