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230431020 = 223523166979
BaseRepresentation
bin11011011110000…
…01100100101100
3121001121002221020
431233001210230
5432442243040
634510534140
75465426361
oct1557014454
9531532836
10230431020
11109088266
1265207350
1338980521
1422864468
151536acd0
hexdbc192c

230431020 has 48 divisors (see below), whose sum is σ = 673263360. Its totient is φ = 58776256.

The previous prime is 230431007. The next prime is 230431051. The reversal of 230431020 is 20134032.

230431020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82110 + ... + 84869.

It is an arithmetic number, because the mean of its divisors is an integer number (14026320).

Almost surely, 2230431020 is an apocalyptic number.

230431020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230431020 is an abundant number, since it is smaller than the sum of its proper divisors (442832340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230431020 is a wasteful number, since it uses less digits than its factorization.

230431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167014 (or 167012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 230431020 is about 15179.9545453865. The cubic root of 230431020 is about 613.0750573175.

Adding to 230431020 its reverse (20134032), we get a palindrome (250565052).

The spelling of 230431020 in words is "two hundred thirty million, four hundred thirty-one thousand, twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 23 30 46 60 69 92 115 138 230 276 345 460 690 1380 166979 333958 500937 667916 834895 1001874 1669790 2003748 2504685 3339580 3840517 5009370 7681034 10018740 11521551 15362068 19202585 23043102 38405170 46086204 57607755 76810340 115215510 230431020