131513665 has 8 divisors (see below), whose sum is σ = 157956480. Its totient is φ = 105117552.

The previous prime is 131513663. The next prime is 131513677. The reversal of 131513665 is 566315131.

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

It is a cyclic number.

It is not a de Polignac number, because 131513665 - 2¹ = 131513663 is a prime.

It is a super-3 number, since 3×131513665³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (131513663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5145 + ... + 17014.

It is an arithmetic number, because the mean of its divisors is an integer number (19744560).

Almost surely, 2^131513665 is an apocalyptic number.

It is an amenable number.

131513665 is a deficient number, since it is larger than the sum of its proper divisors (26442815).

131513665 is a wasteful number, since it uses less digits than its factorization.

131513665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23351.

The product of its digits is 8100, while the sum is 31.

The square root of 131513665 is about 11467.9407480157. The cubic root of 131513665 is about 508.5382531932.

Adding to 131513665 its reverse (566315131), we get a palindrome (697828796).

The spelling of 131513665 in words is "one hundred thirty-one million, five hundred thirteen thousand, six hundred sixty-five".