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253130453 = 643393671
BaseRepresentation
bin11110001011001…
…11011011010101
3122122022100200222
433011213123111
51004300133303
641041244125
76162400442
oct1705473325
9578270628
10253130453
1111a981724
1270933645
134059a544
14258929c9
1517351938
hexf1676d5

253130453 has 4 divisors (see below), whose sum is σ = 253524768. Its totient is φ = 252736140.

The previous prime is 253130447. The next prime is 253130513. The reversal of 253130453 is 354031352.

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 not a de Polignac number, because 253130453 - 26 = 253130389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253130413) 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 3 ways as a sum of consecutive naturals, for example, 196193 + ... + 197478.

It is an arithmetic number, because the mean of its divisors is an integer number (63381192).

Almost surely, 2253130453 is an apocalyptic number.

It is an amenable number.

253130453 is a deficient number, since it is larger than the sum of its proper divisors (394315).

253130453 is an equidigital number, since it uses as much as digits as its factorization.

253130453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394314.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 253130453 is about 15910.0739470312. The cubic root of 253130453 is about 632.5790414013.

The spelling of 253130453 in words is "two hundred fifty-three million, one hundred thirty thousand, four hundred fifty-three".

Divisors: 1 643 393671 253130453