131001231 has 8 divisors (see below), whose sum is σ = 175034880. Its totient is φ = 87150872.

The previous prime is 131001229. The next prime is 131001253. The reversal of 131001231 is 132100131.

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 131001231 - 2¹ = 131001229 is a prime.

It is a super-2 number, since 2×131001231² = 34322645047030722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131001131) 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, 44145 + ... + 47018.

It is an arithmetic number, because the mean of its divisors is an integer number (21879360).

Almost surely, 2^131001231 is an apocalyptic number.

131001231 is a deficient number, since it is larger than the sum of its proper divisors (44033649).

131001231 is an equidigital number, since it uses as much as digits as its factorization.

131001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91645.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131001231 is about 11445.5769186180. The cubic root of 131001231 is about 507.8768986340.

Adding to 131001231 its reverse (132100131), we get a palindrome (263101362).

The spelling of 131001231 in words is "one hundred thirty-one million, one thousand, two hundred thirty-one".