131615 has 8 divisors (see below), whose sum is σ = 172368. Its totient is φ = 95680.

The previous prime is 131611. The next prime is 131617. The reversal of 131615 is 516131.

131615 is nontrivially palindromic in base 7.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131615 - 2² = 131611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131593 and 131602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131611) 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 7 ways as a sum of consecutive naturals, for example, 1142 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (21546).

2¹³¹⁶¹⁵ is an apocalyptic number.

131615 is a deficient number, since it is larger than the sum of its proper divisors (40753).

131615 is a wasteful number, since it uses less digits than its factorization.

131615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409.

The product of its digits is 90, while the sum is 17.

The square root of 131615 is about 362.7878167745. The cubic root of 131615 is about 50.8668834031.

Adding to 131615 its reverse (516131), we get a palindrome (647746).

It can be divided in two parts, 1316 and 15, that added together give a palindrome (1331).

The spelling of 131615 in words is "one hundred thirty-one thousand, six hundred fifteen".