131545491 has 16 divisors (see below), whose sum is σ = 218673408. Its totient is φ = 68335200.

The previous prime is 131545481. The next prime is 131545501. The reversal of 131545491 is 194545131.

It is an interprime number because it is at equal distance from previous prime (131545481) and next prime (131545501).

It is not a de Polignac number, because 131545491 - 2⁵ = 131545459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (131545481) 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 15 ways as a sum of consecutive naturals, for example, 284500 + ... + 284961.

It is an arithmetic number, because the mean of its divisors is an integer number (13667088).

Almost surely, 2^131545491 is an apocalyptic number.

131545491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131545491 is a deficient number, since it is larger than the sum of its proper divisors (87127917).

131545491 is a wasteful number, since it uses less digits than its factorization.

131545491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569482.

The product of its digits is 10800, while the sum is 33.

The square root of 131545491 is about 11469.3282715249. The cubic root of 131545491 is about 508.5792715747.

The spelling of 131545491 in words is "one hundred thirty-one million, five hundred forty-five thousand, four hundred ninety-one".