131603306 has 32 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 62529264.

The previous prime is 131603299. The next prime is 131603333. The reversal of 131603306 is 603306131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 735125 + ... + 735303.

It is an arithmetic number, because the mean of its divisors is an integer number (6486480).

Almost surely, 2^131603306 is an apocalyptic number.

131603306 is a deficient number, since it is larger than the sum of its proper divisors (75964054).

131603306 is a wasteful number, since it uses less digits than its factorization.

131603306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 131603306 is about 11471.8484125271. The cubic root of 131603306 is about 508.6537685003.

Adding to 131603306 its reverse (603306131), we get a palindrome (734909437).

The spelling of 131603306 in words is "one hundred thirty-one million, six hundred three thousand, three hundred six".