131503491 has 12 divisors (see below), whose sum is σ = 217085232. Its totient is φ = 75144816.

The previous prime is 131503481. The next prime is 131503553. The reversal of 131503491 is 194305131.

131503491 is a `hidden beast` number, since 1 + 315 + 0 + 349 + 1 = 666.

It is not a de Polignac number, because 131503491 - 2⁵ = 131503459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131503481) 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, 1043616 + ... + 1043741.

It is an arithmetic number, because the mean of its divisors is an integer number (18090436).

Almost surely, 2^131503491 is an apocalyptic number.

131503491 is a deficient number, since it is larger than the sum of its proper divisors (85581741).

131503491 is a wasteful number, since it uses less digits than its factorization.

131503491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087370 (or 2087367 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 131503491 is about 11467.4971550029. The cubic root of 131503491 is about 508.5251392160.

It can be divided in two parts, 13150 and 3491, that added together give a square (16641 = 129²).

The spelling of 131503491 in words is "one hundred thirty-one million, five hundred three thousand, four hundred ninety-one".