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68214185 = 5132394391
BaseRepresentation
bin1000001000011…
…01110110101001
311202100122021022
410010031312221
5114430323220
610434022225
71455545114
oct404156651
9152318238
1068214185
1135561366
121aa17975
1311194a30
1490b957b
155ec6925
hex410dda9

68214185 has 16 divisors (see below), whose sum is σ = 88542720. Its totient is φ = 50151360.

The previous prime is 68214169. The next prime is 68214187. The reversal of 68214185 is 58141286.

It is not a de Polignac number, because 68214185 - 24 = 68214169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68214187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13340 + ... + 17730.

It is an arithmetic number, because the mean of its divisors is an integer number (5533920).

Almost surely, 268214185 is an apocalyptic number.

68214185 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68214185 is a deficient number, since it is larger than the sum of its proper divisors (20328535).

68214185 is a wasteful number, since it uses less digits than its factorization.

68214185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648.

The product of its digits is 15360, while the sum is 35.

The square root of 68214185 is about 8259.1879140748. The cubic root of 68214185 is about 408.5936048115.

The spelling of 68214185 in words is "sixty-eight million, two hundred fourteen thousand, one hundred eighty-five".

Divisors: 1 5 13 65 239 1195 3107 4391 15535 21955 57083 285415 1049449 5247245 13642837 68214185