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53208811 = 283188017
BaseRepresentation
bin1100101011111…
…0011011101011
310201010021202201
43022332123223
5102110140221
65140241031
71214160505
oct312763353
9121107681
1053208811
1128042627
12159a0177
13b03cb06
1470d0d75
154a10891
hex32be6eb

53208811 has 4 divisors (see below), whose sum is σ = 53397112. Its totient is φ = 53020512.

The previous prime is 53208781. The next prime is 53208817. The reversal of 53208811 is 11880235.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11880235 = 52376047.

It is a cyclic number.

It is not a de Polignac number, because 53208811 - 211 = 53206763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53208811.

It is not an unprimeable number, because it can be changed into a prime (53208817) 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 3 ways as a sum of consecutive naturals, for example, 93726 + ... + 94291.

It is an arithmetic number, because the mean of its divisors is an integer number (13349278).

Almost surely, 253208811 is an apocalyptic number.

53208811 is a deficient number, since it is larger than the sum of its proper divisors (188301).

53208811 is a wasteful number, since it uses less digits than its factorization.

53208811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188300.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 53208811 is about 7294.4369899260. The cubic root of 53208811 is about 376.1212332584.

The spelling of 53208811 in words is "fifty-three million, two hundred eight thousand, eight hundred eleven".

Divisors: 1 283 188017 53208811