131215 has 16 divisors (see below), whose sum is σ = 188928. Its totient is φ = 85536.

The previous prime is 131213. The next prime is 131221. The reversal of 131215 is 512131.

It is a cyclic number.

It is not a de Polignac number, because 131215 - 2¹ = 131213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131195 and 131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724 + ... + 886.

It is an arithmetic number, because the mean of its divisors is an integer number (11808).

2¹³¹²¹⁵ is an apocalyptic number.

131215 is a deficient number, since it is larger than the sum of its proper divisors (57713).

131215 is a wasteful number, since it uses less digits than its factorization.

131215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its digits is 30, while the sum is 13.

The square root of 131215 is about 362.2361108448. The cubic root of 131215 is about 50.8153001220.

Adding to 131215 its reverse (512131), we get a palindrome (643346).

The spelling of 131215 in words is "one hundred thirty-one thousand, two hundred fifteen".