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53131230 = 23254313729
BaseRepresentation
bin1100101010101…
…1011111011110
310200222100100100
43022223133132
5102100144410
65134441530
71213415355
oct312533736
9120870310
1053131230
1127a9a309
12159632a6
13b0136c9
1470b099c
1549e78c0
hex32ab7de

53131230 has 48 divisors (see below), whose sum is σ = 141364080. Its totient is φ = 13837824.

The previous prime is 53131193. The next prime is 53131231. The reversal of 53131230 is 3213135.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2995 + ... + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (2945085).

Almost surely, 253131230 is an apocalyptic number.

53131230 is an abundant number, since it is smaller than the sum of its proper divisors (88232850).

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

53131230 is a wasteful number, since it uses less digits than its factorization.

53131230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785 (or 13782 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 53131230 is about 7289.1172305019. The cubic root of 53131230 is about 375.9383434060.

Adding to 53131230 its reverse (3213135), we get a palindrome (56344365).

It can be divided in two parts, 53131 and 230, that added together give a square (53361 = 2312).

The spelling of 53131230 in words is "fifty-three million, one hundred thirty-one thousand, two hundred thirty".

Divisors: 1 2 3 5 6 9 10 15 18 30 43 45 86 90 129 215 258 387 430 645 774 1290 1935 3870 13729 27458 41187 68645 82374 123561 137290 205935 247122 411870 590347 617805 1180694 1235610 1771041 2951735 3542082 5313123 5903470 8855205 10626246 17710410 26565615 53131230