131855531 has 8 divisors (see below), whose sum is σ = 137442960. Its totient is φ = 126374688.

The previous prime is 131855473. The next prime is 131855533. The reversal of 131855531 is 135558131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131855531 - 2¹⁰ = 131854507 is a prime.

It is a super-2 number, since 2×131855531² = 34771762110583922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131855533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24116 + ... + 29073.

It is an arithmetic number, because the mean of its divisors is an integer number (17180370).

Almost surely, 2^131855531 is an apocalyptic number.

131855531 is a deficient number, since it is larger than the sum of its proper divisors (5587429).

131855531 is an equidigital number, since it uses as much as digits as its factorization.

131855531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53293.

The product of its digits is 9000, while the sum is 32.

The square root of 131855531 is about 11482.8363656372. The cubic root of 131855531 is about 508.9785154645.

The spelling of 131855531 in words is "one hundred thirty-one million, eight hundred fifty-five thousand, five hundred thirty-one".