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12761050031 = 37871336961
BaseRepresentation
bin10111110001001111…
…00010101110101111
31012221100011111201122
423320213202232233
5202113312100111
65510133331155
7631142064332
oct137047425657
935840144648
1012761050031
115459309844
122581796abb
131284a2aaa2
14890b28619
154ea4a1cdb
hex2f89e2baf

12761050031 has 4 divisors (see below), whose sum is σ = 12761424864. Its totient is φ = 12760675200.

The previous prime is 12761050007. The next prime is 12761050039. The reversal of 12761050031 is 13005016721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13005016721 = 16649781129.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12761050031 is a prime.

It is a super-2 number, since 2×127610500312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12761050039) 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, 130610 + ... + 206351.

It is an arithmetic number, because the mean of its divisors is an integer number (3190356216).

Almost surely, 212761050031 is an apocalyptic number.

12761050031 is a deficient number, since it is larger than the sum of its proper divisors (374833).

12761050031 is an equidigital number, since it uses as much as digits as its factorization.

12761050031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374832.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 12761050031 its reverse (13005016721), we get a palindrome (25766066752).

The spelling of 12761050031 in words is "twelve billion, seven hundred sixty-one million, fifty thousand, thirty-one".

Divisors: 1 37871 336961 12761050031