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52143186 = 238690531
BaseRepresentation
bin1100011011101…
…0010001010010
310122010011000010
43012322101102
5101322040221
65101335350
71202131644
oct306722122
9118104003
1052143186
1127484a47
1215567556
13aa58a74
146cd4894
15489ec76
hex31ba452

52143186 has 8 divisors (see below), whose sum is σ = 104286384. Its totient is φ = 17381060.

The previous prime is 52143167. The next prime is 52143187. The reversal of 52143186 is 68134125.

It is a sphenic number, since it is the product of 3 distinct primes.

52143186 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (52143187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4345260 + ... + 4345271.

It is an arithmetic number, because the mean of its divisors is an integer number (13035798).

Almost surely, 252143186 is an apocalyptic number.

52143186 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

52143186 is a wasteful number, since it uses less digits than its factorization.

52143186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8690536.

The product of its digits is 5760, while the sum is 30.

The square root of 52143186 is about 7221.0238886186. The cubic root of 52143186 is about 373.5933935971.

The spelling of 52143186 in words is "fifty-two million, one hundred forty-three thousand, one hundred eighty-six".

Divisors: 1 2 3 6 8690531 17381062 26071593 52143186