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13131212441 = 29795731651
BaseRepresentation
bin11000011101010111…
…00110011010011001
31020220010200201002112
430032223212122121
5203343042244231
610010555242105
7643255315124
oct141653463231
936803621075
1013131212441
115629255296
122665749335
1313136232b9
148c7d633bb
1551cc1e92b
hex30eae6699

13131212441 has 8 divisors (see below), whose sum is σ = 13755964800. Its totient is φ = 12517923600.

The previous prime is 13131212387. The next prime is 13131212447. The reversal of 13131212441 is 14421213131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13131212441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13131212447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2863535 + ... + 2868116.

It is an arithmetic number, because the mean of its divisors is an integer number (1719495600).

Almost surely, 213131212441 is an apocalyptic number.

It is an amenable number.

13131212441 is a deficient number, since it is larger than the sum of its proper divisors (624752359).

13131212441 is an equidigital number, since it uses as much as digits as its factorization.

13131212441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731759.

The product of its digits is 576, while the sum is 23.

Adding to 13131212441 its reverse (14421213131), we get a palindrome (27552425572).

The spelling of 13131212441 in words is "thirteen billion, one hundred thirty-one million, two hundred twelve thousand, four hundred forty-one".

Divisors: 1 29 79 2291 5731651 166217879 452800429 13131212441