131520603 has 12 divisors (see below), whose sum is σ = 185077608. Its totient is φ = 83064960.

The previous prime is 131520593. The next prime is 131520629. The reversal of 131520603 is 306025131.

It is not a de Polignac number, because 131520603 - 2¹⁸ = 131258459 is a prime.

It is a super-3 number, since 3×131520603³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131520603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131520643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59638 + ... + 61803.

It is an arithmetic number, because the mean of its divisors is an integer number (15423134).

Almost surely, 2^131520603 is an apocalyptic number.

131520603 is a deficient number, since it is larger than the sum of its proper divisors (53557005).

131520603 is a wasteful number, since it uses less digits than its factorization.

131520603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121482 (or 121463 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131520603 is about 11468.2432394853. The cubic root of 131520603 is about 508.5471956767.

Adding to 131520603 its reverse (306025131), we get a palindrome (437545734).

The spelling of 131520603 in words is "one hundred thirty-one million, five hundred twenty thousand, six hundred three".