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253025279 = 1323174723
BaseRepresentation
bin11110001010011…
…01101111111111
3122122010000102122
433011031233333
51004233302104
641035113155
76161452013
oct1705155777
9578100378
10253025279
1111a90a701
12708a27bb
1340561700
1425866543
15173306be
hexf14dbff

253025279 has 12 divisors (see below), whose sum is σ = 274908456. Its totient is φ = 232775712.

The previous prime is 253025273. The next prime is 253025281. The reversal of 253025279 is 972520352.

It is not a de Polignac number, because 253025279 - 28 = 253025023 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253025273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51212 + ... + 55934.

It is an arithmetic number, because the mean of its divisors is an integer number (22909038).

Almost surely, 2253025279 is an apocalyptic number.

253025279 is a deficient number, since it is larger than the sum of its proper divisors (21883177).

253025279 is a wasteful number, since it uses less digits than its factorization.

253025279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066 (or 5053 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 253025279 is about 15906.7683392951. The cubic root of 253025279 is about 632.4914184862.

The spelling of 253025279 in words is "two hundred fifty-three million, twenty-five thousand, two hundred seventy-nine".

Divisors: 1 13 169 317 4121 4723 53573 61399 798187 1497191 19463483 253025279