131205003 has 4 divisors (see below), whose sum is σ = 174940008. Its totient is φ = 87470000.

The previous prime is 131204977. The next prime is 131205049. The reversal of 131205003 is 300502131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300502131 = 3 ⋅100167377.

It is a cyclic number.

It is not a de Polignac number, because 131205003 - 2⁶ = 131204939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131205073) 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, 21867498 + ... + 21867503.

It is an arithmetic number, because the mean of its divisors is an integer number (43735002).

Almost surely, 2^131205003 is an apocalyptic number.

131205003 is a deficient number, since it is larger than the sum of its proper divisors (43735005).

131205003 is an equidigital number, since it uses as much as digits as its factorization.

131205003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43735004.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 131205003 is about 11454.4752389623. The cubic root of 131205003 is about 508.1400958495.

Adding to 131205003 its reverse (300502131), we get a palindrome (431707134).

The spelling of 131205003 in words is "one hundred thirty-one million, two hundred five thousand, three".