131500555 has 8 divisors (see below), whose sum is σ = 157910544. Its totient is φ = 105127200.

The previous prime is 131500549. The next prime is 131500601. The reversal of 131500555 is 555005131.

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

It is not a de Polignac number, because 131500555 - 2³ = 131500547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516 + ... + 16225.

It is an arithmetic number, because the mean of its divisors is an integer number (19738818).

Almost surely, 2^131500555 is an apocalyptic number.

131500555 is a deficient number, since it is larger than the sum of its proper divisors (26409989).

131500555 is a wasteful number, since it uses less digits than its factorization.

131500555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18317.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 131500555 is about 11467.3691403042. The cubic root of 131500555 is about 508.5213546753.

Adding to 131500555 its reverse (555005131), we get a palindrome (686505686).

The spelling of 131500555 in words is "one hundred thirty-one million, five hundred thousand, five hundred fifty-five".