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253203131 = 618946639
BaseRepresentation
bin11110001011110…
…01001010111011
3122122110001101202
433011321022323
51004310000011
641043004415
76163122356
oct1705711273
9578401352
10253203131
1111aa21295
127096970b
13405c464c
14258b129d
151736823b
hexf1792bb

253203131 has 8 divisors (see below), whose sum is σ = 260251200. Its totient is φ = 246248640.

The previous prime is 253203047. The next prime is 253203157. The reversal of 253203131 is 131302352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-253203131 is a prime.

It is a super-2 number, since 2×2532031312 = 128223651096406322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253205131) 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 7 ways as a sum of consecutive naturals, for example, 17891 + ... + 28748.

It is an arithmetic number, because the mean of its divisors is an integer number (32531400).

Almost surely, 2253203131 is an apocalyptic number.

253203131 is a deficient number, since it is larger than the sum of its proper divisors (7048069).

253203131 is an equidigital number, since it uses as much as digits as its factorization.

253203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46789.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 253203131 is about 15912.3578076915. The cubic root of 253203131 is about 632.6395769601.

Adding to 253203131 its reverse (131302352), we get a palindrome (384505483).

The spelling of 253203131 in words is "two hundred fifty-three million, two hundred three thousand, one hundred thirty-one".

Divisors: 1 61 89 5429 46639 2844979 4150871 253203131