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253681607 = 475639587
BaseRepresentation
bin11110001111011…
…01111111000111
3122200100100202002
433013231333013
51004420302412
641101135515
76200154344
oct1707557707
9580310662
10253681607
11120218823
1270b5a59b
134073137a
14259977cb
151740edc2
hexf1edfc7

253681607 has 8 divisors (see below), whose sum is σ = 259566336. Its totient is φ = 247817272.

The previous prime is 253681591. The next prime is 253681609. The reversal of 253681607 is 706186352.

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

It is a cyclic number.

It is not a de Polignac number, because 253681607 - 24 = 253681591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253681609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21668 + ... + 31254.

It is an arithmetic number, because the mean of its divisors is an integer number (32445792).

Almost surely, 2253681607 is an apocalyptic number.

253681607 is a deficient number, since it is larger than the sum of its proper divisors (5884729).

253681607 is an equidigital number, since it uses as much as digits as its factorization.

253681607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10197.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 253681607 is about 15927.3854414339. The cubic root of 253681607 is about 633.0378242503.

The spelling of 253681607 in words is "two hundred fifty-three million, six hundred eighty-one thousand, six hundred seven".

Divisors: 1 47 563 9587 26461 450589 5397481 253681607