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253084287 = 31710348179
BaseRepresentation
bin11110001010111…
…00001001111111
3122122020000101010
433011130021333
51004242144122
641040250303
76162116031
oct1705341177
9578200333
10253084287
1111a94aa75
1270910993
1340582521
142587dc51
1517342e0c
hexf15c27f

253084287 has 16 divisors (see below), whose sum is σ = 360771840. Its totient is φ = 157252992.

The previous prime is 253084277. The next prime is 253084289. The reversal of 253084287 is 782480352.

It is not a de Polignac number, because 253084287 - 211 = 253082239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253084289) 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 15 ways as a sum of consecutive naturals, for example, 18837 + ... + 29342.

It is an arithmetic number, because the mean of its divisors is an integer number (22548240).

Almost surely, 2253084287 is an apocalyptic number.

253084287 is a deficient number, since it is larger than the sum of its proper divisors (107687553).

253084287 is a wasteful number, since it uses less digits than its factorization.

253084287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48302.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 253084287 is about 15908.6230390942. The cubic root of 253084287 is about 632.5405824180.

The spelling of 253084287 in words is "two hundred fifty-three million, eighty-four thousand, two hundred eighty-seven".

Divisors: 1 3 17 51 103 309 1751 5253 48179 144537 819043 2457129 4962437 14887311 84361429 253084287