133131345 has 16 divisors (see below), whose sum is σ = 216191040. Its totient is φ = 69943104.

The previous prime is 133131343. The next prime is 133131367. The reversal of 133131345 is 543131331.

It is not a de Polignac number, because 133131345 - 2¹ = 133131343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133131343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65230 + ... + 67239.

It is an arithmetic number, because the mean of its divisors is an integer number (13511940).

Almost surely, 2^133131345 is an apocalyptic number.

133131345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133131345 is a deficient number, since it is larger than the sum of its proper divisors (83059695).

133131345 is a wasteful number, since it uses less digits than its factorization.

133131345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132544.

The product of its digits is 1620, while the sum is 24.

The square root of 133131345 is about 11538.2557173951. The cubic root of 133131345 is about 510.6148486072.

Adding to 133131345 its reverse (543131331), we get a palindrome (676262676).

The spelling of 133131345 in words is "one hundred thirty-three million, one hundred thirty-one thousand, three hundred forty-five".