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253205141 = 736172163
BaseRepresentation
bin11110001011110…
…01101010010101
3122122110011011012
433011321222111
51004310031031
641043022005
76163131260
oct1705715225
9578404135
10253205141
1111aa22852
127096a905
13405c5537
14258b1cd7
1517368b2b
hexf179a95

253205141 has 4 divisors (see below), whose sum is σ = 289377312. Its totient is φ = 217032972.

The previous prime is 253205131. The next prime is 253205159. The reversal of 253205141 is 141502352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-253205141 is a prime.

It is a super-2 number, since 2×2532051412 = 128225686857659762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253205101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18086075 + ... + 18086088.

It is an arithmetic number, because the mean of its divisors is an integer number (72344328).

Almost surely, 2253205141 is an apocalyptic number.

It is an amenable number.

253205141 is a deficient number, since it is larger than the sum of its proper divisors (36172171).

253205141 is an equidigital number, since it uses as much as digits as its factorization.

253205141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36172170.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 253205141 is about 15912.4209660253. The cubic root of 253205141 is about 632.6412509812.

Adding to 253205141 its reverse (141502352), we get a palindrome (394707493).

The spelling of 253205141 in words is "two hundred fifty-three million, two hundred five thousand, one hundred forty-one".

Divisors: 1 7 36172163 253205141