131505003 has 12 divisors (see below), whose sum is σ = 217087728. Its totient is φ = 75145680.

The previous prime is 131505001. The next prime is 131505037. The reversal of 131505003 is 300505131.

It is a happy number.

131505003 is a `hidden beast` number, since 13 + 150 + 500 + 3 = 666.

It is not a de Polignac number, because 131505003 - 2¹ = 131505001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131505001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1043628 + ... + 1043753.

It is an arithmetic number, because the mean of its divisors is an integer number (18090644).

Almost surely, 2^131505003 is an apocalyptic number.

131505003 is a deficient number, since it is larger than the sum of its proper divisors (85582725).

131505003 is a wasteful number, since it uses less digits than its factorization.

131505003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087394 (or 2087391 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 131505003 is about 11467.5630802712. The cubic root of 131505003 is about 508.5270881809.

The spelling of 131505003 in words is "one hundred thirty-one million, five hundred five thousand, three".