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520213430 = 251117283983
BaseRepresentation
bin11111000000011…
…101001110110110
31100020212120200002
4133000131032312
52031133312210
6123341551302
715614512142
oct3700351666
91306776602
10520213430
11247713060
12126275532
1383a116c9
144d138222
1530a0c4a5
hex1f01d3b6

520213430 has 64 divisors (see below), whose sum is σ = 1086524928. Its totient is φ = 177231360.

The previous prime is 520213427. The next prime is 520213439. The reversal of 520213430 is 34312025.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520213439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528719 + ... + 529701.

It is an arithmetic number, because the mean of its divisors is an integer number (16976952).

Almost surely, 2520213430 is an apocalyptic number.

520213430 is an abundant number, since it is smaller than the sum of its proper divisors (566311498).

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

520213430 is a wasteful number, since it uses less digits than its factorization.

520213430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 520213430 is about 22808.1877842147. The cubic root of 520213430 is about 804.2551550664.

Adding to 520213430 its reverse (34312025), we get a palindrome (554525455).

The spelling of 520213430 in words is "five hundred twenty million, two hundred thirteen thousand, four hundred thirty".

Divisors: 1 2 5 10 11 17 22 34 55 85 110 170 187 283 374 566 935 983 1415 1870 1966 2830 3113 4811 4915 6226 9622 9830 10813 15565 16711 21626 24055 31130 33422 48110 52921 54065 83555 105842 108130 167110 183821 264605 278189 367642 529210 556378 919105 1390945 1838210 2781890 3060079 4729213 6120158 9458426 15300395 23646065 30600790 47292130 52021343 104042686 260106715 520213430