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12512451517 is a prime number
BaseRepresentation
bin10111010011100110…
…01101101110111101
31012022000101101200021
423221303031232331
5201111141422032
65425333132141
7622033040326
oct135163155675
935260341607
1012512451517
115340a53025
12251248a051
131245389287
14869ad544d
154d3748097
hex2e9ccdbbd

12512451517 has 2 divisors, whose sum is σ = 12512451518. Its totient is φ = 12512451516.

The previous prime is 12512451509. The next prime is 12512451533. The reversal of 12512451517 is 71515421521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12421325401 + 91126116 = 111451^2 + 9546^2 .

It is a cyclic number.

It is not a de Polignac number, because 12512451517 - 23 = 12512451509 is a prime.

It is a super-2 number, since 2×125124515172 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12512451547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256225758 + 6256225759.

It is an arithmetic number, because the mean of its divisors is an integer number (6256225759).

Almost surely, 212512451517 is an apocalyptic number.

It is an amenable number.

12512451517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12512451517 is an equidigital number, since it uses as much as digits as its factorization.

12512451517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 34.

The spelling of 12512451517 in words is "twelve billion, five hundred twelve million, four hundred fifty-one thousand, five hundred seventeen".