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13101131 = 38933679
BaseRepresentation
bin110001111110…
…100001001011
3220122121101002
4301332201023
511323214011
61144445215
7216233501
oct61764113
926577332
1013101131
11743908a
12447980b
132939264
141a50671
15123bc3b
hexc7e84b

13101131 has 4 divisors (see below), whose sum is σ = 13135200. Its totient is φ = 13067064.

The previous prime is 13101119. The next prime is 13101157. The reversal of 13101131 is 13110131.

Adding to 13101131 its reverse (13110131), we get a palindrome (26211262).

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13110131 = 39733023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13101131 is a prime.

It is a super-2 number, since 2×131011312 = 343279266958322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13101331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16451 + ... + 17228.

It is an arithmetic number, because the mean of its divisors is an integer number (3283800).

Almost surely, 213101131 is an apocalyptic number.

13101131 is a deficient number, since it is larger than the sum of its proper divisors (34069).

13101131 is an equidigital number, since it uses as much as digits as its factorization.

13101131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34068.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 13101131 is about 3619.5484525007. The cubic root of 13101131 is about 235.7416196908.

The spelling of 13101131 in words is "thirteen million, one hundred one thousand, one hundred thirty-one".

Divisors: 1 389 33679 13101131