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230302021 = 1929478893
BaseRepresentation
bin11011011101000…
…10000101000101
3121001100112222111
431232202011011
5432424131041
634504101021
75464351315
oct1556420505
9531315874
10230302021
11108aaa354
1265164771
13389368b1
142282d445
1515342981
hexdba2145

230302021 has 16 divisors (see below), whose sum is σ = 256147200. Its totient is φ = 206152128.

The previous prime is 230301997. The next prime is 230302027. The reversal of 230302021 is 120203032.

It is a happy number.

It is not a de Polignac number, because 230302021 - 29 = 230301509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230301992 and 230302010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230302027) 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 15 ways as a sum of consecutive naturals, for example, 21451 + ... + 30343.

It is an arithmetic number, because the mean of its divisors is an integer number (16009200).

Almost surely, 2230302021 is an apocalyptic number.

It is an amenable number.

230302021 is a deficient number, since it is larger than the sum of its proper divisors (25845179).

230302021 is a wasteful number, since it uses less digits than its factorization.

230302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8988.

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

The square root of 230302021 is about 15175.7049589138. The cubic root of 230302021 is about 612.9606328622.

Adding to 230302021 its reverse (120203032), we get a palindrome (350505053).

The spelling of 230302021 in words is "two hundred thirty million, three hundred two thousand, twenty-one".

Divisors: 1 19 29 47 551 893 1363 8893 25897 168967 257897 417971 4900043 7941449 12121159 230302021