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53117208 = 233481971
BaseRepresentation
bin1100101010100…
…0000100011000
310200221122010000
43022220010120
5102044222313
65134253000
71213326444
oct312500430
9120848100
1053117208
1127a8a821
1215957160
13b00a201
1470a9824
1549e3673
hex32a8118

53117208 has 40 divisors (see below), whose sum is σ = 148779180. Its totient is φ = 17705520.

The previous prime is 53117201. The next prime is 53117219. The reversal of 53117208 is 80271135.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53117201) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40338 + ... + 41633.

Almost surely, 253117208 is an apocalyptic number.

It is an amenable number.

53117208 is an abundant number, since it is smaller than the sum of its proper divisors (95661972).

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

53117208 is a wasteful number, since it uses less digits than its factorization.

53117208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81989 (or 81976 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 53117208 is about 7288.1553221649. The cubic root of 53117208 is about 375.9052688768.

The spelling of 53117208 in words is "fifty-three million, one hundred seventeen thousand, two hundred eight".

Divisors: 1 2 3 4 6 8 9 12 18 24 27 36 54 72 81 108 162 216 324 648 81971 163942 245913 327884 491826 655768 737739 983652 1475478 1967304 2213217 2950956 4426434 5901912 6639651 8852868 13279302 17705736 26558604 53117208