131031345 has 32 divisors (see below), whose sum is σ = 220320000. Its totient is φ = 66370304.

The previous prime is 131031337. The next prime is 131031349. The reversal of 131031345 is 543130131.

It is a cyclic number.

It is not a de Polignac number, because 131031345 - 2³ = 131031337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131031349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50131 + ... + 52679.

It is an arithmetic number, because the mean of its divisors is an integer number (6885000).

Almost surely, 2^131031345 is an apocalyptic number.

131031345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131031345 is a deficient number, since it is larger than the sum of its proper divisors (89288655).

131031345 is a wasteful number, since it uses less digits than its factorization.

131031345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131031345 is about 11446.8923730417. The cubic root of 131031345 is about 507.9158118387.

Adding to 131031345 its reverse (543130131), we get a palindrome (674161476).

The spelling of 131031345 in words is "one hundred thirty-one million, thirty-one thousand, three hundred forty-five".