131289231 has 8 divisors (see below), whose sum is σ = 177268480. Its totient is φ = 86418072.

The previous prime is 131289229. The next prime is 131289233. The reversal of 131289231 is 132982131.

It is an interprime number because it is at equal distance from previous prime (131289229) and next prime (131289233).

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

It is not a de Polignac number, because 131289231 - 2¹ = 131289229 is a prime.

It is a super-2 number, since 2×131289231² = 34473724353142722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131289233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276745 + ... + 277218.

It is an arithmetic number, because the mean of its divisors is an integer number (22158560).

Almost surely, 2^131289231 is an apocalyptic number.

131289231 is a deficient number, since it is larger than the sum of its proper divisors (45979249).

131289231 is an equidigital number, since it uses as much as digits as its factorization.

131289231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554045.

The product of its digits is 2592, while the sum is 30.

The square root of 131289231 is about 11458.1512906751. The cubic root of 131289231 is about 508.2488073259.

The spelling of 131289231 in words is "one hundred thirty-one million, two hundred eighty-nine thousand, two hundred thirty-one".