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253225531 = 1321192317
BaseRepresentation
bin11110001011111…
…10101000111011
3122122111012010101
433011332220323
51004311204111
641043300231
76163244566
oct1705765073
9578435111
10253225531
1111aa370a9
127097a677
13406018c0
14258b94dd
151736ebc1
hexf17ea3b

253225531 has 8 divisors (see below), whose sum is σ = 273999824. Its totient is φ = 232636320.

The previous prime is 253225501. The next prime is 253225549. The reversal of 253225531 is 135522352.

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 253225531 - 27 = 253225403 is a prime.

It is a super-2 number, since 2×2532255312 = 128246339100463922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253225531.

It is not an unprimeable number, because it can be changed into a prime (253225501) 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, 43416 + ... + 48901.

It is an arithmetic number, because the mean of its divisors is an integer number (34249978).

Almost surely, 2253225531 is an apocalyptic number.

253225531 is a deficient number, since it is larger than the sum of its proper divisors (20774293).

253225531 is a wasteful number, since it uses less digits than its factorization.

253225531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92541.

The product of its digits is 9000, while the sum is 28.

The square root of 253225531 is about 15913.0616475900. The cubic root of 253225531 is about 632.6582322173.

Adding to 253225531 its reverse (135522352), we get a palindrome (388747883).

The spelling of 253225531 in words is "two hundred fifty-three million, two hundred twenty-five thousand, five hundred thirty-one".

Divisors: 1 13 211 2743 92317 1200121 19478887 253225531