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253724145 = 3516914943
BaseRepresentation
bin11110001111110…
…00010111110001
3122200102112002120
433013320113301
51004423133040
641102104453
76200422353
oct1707702761
9580375076
10253724145
11120247784
1270b7b129
134074783c
14259a90d3
151741c7d0
hexf1f85f1

253724145 has 8 divisors (see below), whose sum is σ = 405958656. Its totient is φ = 135319536.

The previous prime is 253724117. The next prime is 253724147. The reversal of 253724145 is 541427352.

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

It is not a de Polignac number, because 253724145 - 211 = 253722097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253724147) 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, 8457457 + ... + 8457486.

It is an arithmetic number, because the mean of its divisors is an integer number (50744832).

Almost surely, 2253724145 is an apocalyptic number.

It is an amenable number.

253724145 is a deficient number, since it is larger than the sum of its proper divisors (152234511).

253724145 is a wasteful number, since it uses less digits than its factorization.

253724145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16914951.

The product of its digits is 33600, while the sum is 33.

The square root of 253724145 is about 15928.7207584288. The cubic root of 253724145 is about 633.0732054227.

The spelling of 253724145 in words is "two hundred fifty-three million, seven hundred twenty-four thousand, one hundred forty-five".