131540606 has 8 divisors (see below), whose sum is σ = 197360904. Its totient is φ = 65753640.

The previous prime is 131540603. The next prime is 131540621. The reversal of 131540606 is 606045131.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131540603) 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, 7721 + ... + 17963.

It is an arithmetic number, because the mean of its divisors is an integer number (24670113).

Almost surely, 2^131540606 is an apocalyptic number.

131540606 is the 6131-st centered heptagonal number.

131540606 is a deficient number, since it is larger than the sum of its proper divisors (65820298).

131540606 is a wasteful number, since it uses less digits than its factorization.

131540606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 131540606 is about 11469.1153102582. The cubic root of 131540606 is about 508.5729760580.

Adding to 131540606 its reverse (606045131), we get a palindrome (737585737).

The spelling of 131540606 in words is "one hundred thirty-one million, five hundred forty thousand, six hundred six".