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255660725 = 5210226429
BaseRepresentation
bin11110011110100…
…01001010110101
3122211001220120202
433033101022311
51010422120400
641211410245
76223036355
oct1717211265
9584056522
10255660725
1112134a761
1271753985
1340c75148
1425d50b65
15176a14d5
hexf3d12b5

255660725 has 6 divisors (see below), whose sum is σ = 317019330. Its totient is φ = 204528560.

The previous prime is 255660719. The next prime is 255660733. The reversal of 255660725 is 527066552.

It can be written as a sum of positive squares in 3 ways, for example, as 16834609 + 238826116 = 4103^2 + 15454^2 .

It is not a de Polignac number, because 255660725 - 26 = 255660661 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5113190 + ... + 5113239.

It is an arithmetic number, because the mean of its divisors is an integer number (52836555).

Almost surely, 2255660725 is an apocalyptic number.

255660725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255660725 is a deficient number, since it is larger than the sum of its proper divisors (61358605).

255660725 is a wasteful number, since it uses less digits than its factorization.

255660725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226439 (or 10226434 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 255660725 is about 15989.3941411174. The cubic root of 255660725 is about 634.6797939194.

The spelling of 255660725 in words is "two hundred fifty-five million, six hundred sixty thousand, seven hundred twenty-five".

Divisors: 1 5 25 10226429 51132145 255660725