131111031 has 8 divisors (see below), whose sum is σ = 175070464. Its totient is φ = 87279480.

The previous prime is 131111011. The next prime is 131111081. The reversal of 131111031 is 130111131.

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

It is a de Polignac number, because none of the positive numbers 2^k-131111031 is a prime.

It is a super-2 number, since 2×131111031² = 34380204899765922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131110998 and 131111016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131111011) 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, 29551 + ... + 33696.

It is an arithmetic number, because the mean of its divisors is an integer number (21883808).

Almost surely, 2^131111031 is an apocalyptic number.

131111031 is a deficient number, since it is larger than the sum of its proper divisors (43959433).

131111031 is an equidigital number, since it uses as much as digits as its factorization.

131111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63941.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 131111031 is about 11450.3725266910. The cubic root of 131111031 is about 508.0187530536.

Adding to 131111031 its reverse (130111131), we get a palindrome (261222162).

The spelling of 131111031 in words is "one hundred thirty-one million, one hundred eleven thousand, thirty-one".