131015 has 4 divisors (see below), whose sum is σ = 157224. Its totient is φ = 104808.

The previous prime is 131011. The next prime is 131023. The reversal of 131015 is 510131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510131 = 19 ⋅26849.

It is a cyclic number.

It is not a de Polignac number, because 131015 - 2² = 131011 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 130987 and 131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131011) 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, 13097 + ... + 13106.

It is an arithmetic number, because the mean of its divisors is an integer number (39306).

2¹³¹⁰¹⁵ is an apocalyptic number.

131015 is a deficient number, since it is larger than the sum of its proper divisors (26209).

131015 is an equidigital number, since it uses as much as digits as its factorization.

131015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26208.

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 131015 is about 361.9599425351. The cubic root of 131015 is about 50.7894691627.

Adding to 131015 its reverse (510131), we get a palindrome (641146).

The spelling of 131015 in words is "one hundred thirty-one thousand, fifteen".