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131315 = 526263
BaseRepresentation
bin100000000011110011
320200010112
4200003303
513200230
62451535
71054562
oct400363
9220115
10131315
118a728
1263bab
1347a02
1435bd9
1528d95
hex200f3

131315 has 4 divisors (see below), whose sum is σ = 157584. Its totient is φ = 105048.

The previous prime is 131311. The next prime is 131317. The reversal of 131315 is 513131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131315 - 22 = 131311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131315.

It is not an unprimeable number, because it can be changed into a prime (131311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13127 + ... + 13136.

It is an arithmetic number, because the mean of its divisors is an integer number (39396).

2131315 is an apocalyptic number.

131315 is a deficient number, since it is larger than the sum of its proper divisors (26269).

131315 is an equidigital number, since it uses as much as digits as its factorization.

131315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26268.

The product of its digits is 45, while the sum is 14.

The square root of 131315 is about 362.3741160734. The cubic root of 131315 is about 50.8282057595.

Adding to 131315 its reverse (513131), we get a palindrome (644446).

The spelling of 131315 in words is "one hundred thirty-one thousand, three hundred fifteen".

Divisors: 1 5 26263 131315