131445345 has 16 divisors (see below), whose sum is σ = 219457152. Its totient is φ = 67056000.

The previous prime is 131445341. The next prime is 131445359. The reversal of 131445345 is 543544131.

It is not a de Polignac number, because 131445345 - 2² = 131445341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131445341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190156 + ... + 190845.

It is an arithmetic number, because the mean of its divisors is an integer number (13716072).

Almost surely, 2^131445345 is an apocalyptic number.

131445345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131445345 is a deficient number, since it is larger than the sum of its proper divisors (88011807).

131445345 is a wasteful number, since it uses less digits than its factorization.

131445345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381032.

The product of its digits is 14400, while the sum is 30.

The square root of 131445345 is about 11464.9616222646. The cubic root of 131445345 is about 508.4501778045.

Adding to 131445345 its reverse (543544131), we get a palindrome (674989476).

The spelling of 131445345 in words is "one hundred thirty-one million, four hundred forty-five thousand, three hundred forty-five".