131111345 has 8 divisors (see below), whose sum is σ = 157576320. Its totient is φ = 104727280.

The previous prime is 131111263. The next prime is 131111359. The reversal of 131111345 is 543111131.

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

It is not a de Polignac number, because 131111345 - 2¹⁰ = 131110321 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16601 + ... + 23190.

It is an arithmetic number, because the mean of its divisors is an integer number (19697040).

Almost surely, 2^131111345 is an apocalyptic number.

It is an amenable number.

131111345 is a deficient number, since it is larger than the sum of its proper divisors (26464975).

131111345 is an equidigital number, since it uses as much as digits as its factorization.

131111345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40455.

The product of its digits is 180, while the sum is 20.

The square root of 131111345 is about 11450.3862380271. The cubic root of 131111345 is about 508.0191586074.

Adding to 131111345 its reverse (543111131), we get a palindrome (674222476).

The spelling of 131111345 in words is "one hundred thirty-one million, one hundred eleven thousand, three hundred forty-five".