131603291 has 16 divisors (see below), whose sum is σ = 141657600. Its totient is φ = 121888800.

The previous prime is 131603287. The next prime is 131603299. The reversal of 131603291 is 192306131.

It is not a de Polignac number, because 131603291 - 2² = 131603287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131603291.

It is not an unprimeable number, because it can be changed into a prime (131603299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313880 + ... + 314298.

It is an arithmetic number, because the mean of its divisors is an integer number (8853600).

Almost surely, 2^131603291 is an apocalyptic number.

131603291 is a deficient number, since it is larger than the sum of its proper divisors (10054309).

131603291 is a wasteful number, since it uses less digits than its factorization.

131603291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 131603291 is about 11471.8477587527. The cubic root of 131603291 is about 508.6537491750.

The spelling of 131603291 in words is "one hundred thirty-one million, six hundred three thousand, two hundred ninety-one".