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13051240541 = 73178784117
BaseRepresentation
bin11000010011110101…
…00010000001011101
31020200120012201021022
430021322202001131
5203212104144131
65555021213525
7641264466653
oct141172420135
936616181238
1013051240541
1155980a3209
122642a012a5
1312ccba2951
148bb4a6dd3
15515bc437b
hex309ea205d

13051240541 has 4 divisors (see below), whose sum is σ = 13230024732. Its totient is φ = 12872456352.

The previous prime is 13051240523. The next prime is 13051240567. The reversal of 13051240541 is 14504215031.

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 5874609316 + 7176631225 = 76646^2 + 84715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13051240541 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 13051240541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13051240511) 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, 89391986 + ... + 89392131.

It is an arithmetic number, because the mean of its divisors is an integer number (3307506183).

Almost surely, 213051240541 is an apocalyptic number.

It is an amenable number.

13051240541 is a deficient number, since it is larger than the sum of its proper divisors (178784191).

13051240541 is an equidigital number, since it uses as much as digits as its factorization.

13051240541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178784190.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 13051240541 its reverse (14504215031), we get a palindrome (27555455572).

The spelling of 13051240541 in words is "thirteen billion, fifty-one million, two hundred forty thousand, five hundred forty-one".

Divisors: 1 73 178784117 13051240541