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15204205241 = 53286871797
BaseRepresentation
bin11100010100011110…
…11100001010111001
31110020121101122121122
432022033130022321
5222114234031431
610552410515025
71045526416661
oct161217341271
943217348548
1015204205241
1164a2417485
122b43a35a75
131583c46464
14a433bd1a1
155debeea7b
hex38a3dc2b9

15204205241 has 4 divisors (see below), whose sum is σ = 15491077092. Its totient is φ = 14917333392.

The previous prime is 15204205217. The next prime is 15204205243. The reversal of 15204205241 is 14250240251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7757205625 + 7446999616 = 88075^2 + 86296^2 .

It is a cyclic number.

It is not a de Polignac number, because 15204205241 - 210 = 15204204217 is a prime.

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 15204205241.

It is not an unprimeable number, because it can be changed into a prime (15204205243) 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, 143435846 + ... + 143435951.

It is an arithmetic number, because the mean of its divisors is an integer number (3872769273).

Almost surely, 215204205241 is an apocalyptic number.

It is an amenable number.

15204205241 is a deficient number, since it is larger than the sum of its proper divisors (286871851).

15204205241 is an equidigital number, since it uses as much as digits as its factorization.

15204205241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286871850.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 15204205241 its reverse (14250240251), we get a palindrome (29454445492).

The spelling of 15204205241 in words is "fifteen billion, two hundred four million, two hundred five thousand, two hundred forty-one".

Divisors: 1 53 286871797 15204205241