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13131030023 = 83158205181
BaseRepresentation
bin11000011101010101…
…11001111000000111
31020220010100102212022
430032222321320013
5203343020430043
610010551313355
7643253625236
oct141652717007
936803312768
1013131030023
115629140231
12266567b85b
13131358b267
148c7d16b1d
1551cbd5868
hex30eab9e07

13131030023 has 4 divisors (see below), whose sum is σ = 13289235288. Its totient is φ = 12972824760.

The previous prime is 13131030001. The next prime is 13131030043. The reversal of 13131030023 is 32003013131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32003013131 = 47680915173.

It is a cyclic number.

It is not a de Polignac number, because 13131030023 - 216 = 13130964487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13131029983 and 13131030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131030043) 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, 79102508 + ... + 79102673.

It is an arithmetic number, because the mean of its divisors is an integer number (3322308822).

Almost surely, 213131030023 is an apocalyptic number.

13131030023 is a deficient number, since it is larger than the sum of its proper divisors (158205265).

13131030023 is an equidigital number, since it uses as much as digits as its factorization.

13131030023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158205264.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 13131030023 its reverse (32003013131), we get a palindrome (45134043154).

The spelling of 13131030023 in words is "thirteen billion, one hundred thirty-one million, thirty thousand, twenty-three".

Divisors: 1 83 158205181 13131030023