133163145 has 24 divisors (see below), whose sum is σ = 231211656. Its totient is φ = 70898688.

The previous prime is 133163143. The next prime is 133163201. The reversal of 133163145 is 541361331.

It can be written as a sum of positive squares in 4 ways, for example, as 6533136 + 126630009 = 2556^2 + 11253^2 .

It is not a de Polignac number, because 133163145 - 2¹ = 133163143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133163143) 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 23 ways as a sum of consecutive naturals, for example, 28087 + ... + 32483.

It is an arithmetic number, because the mean of its divisors is an integer number (9633819).

Almost surely, 2^133163145 is an apocalyptic number.

133163145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133163145 is a deficient number, since it is larger than the sum of its proper divisors (98048511).

133163145 is a wasteful number, since it uses less digits than its factorization.

133163145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081 (or 5078 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 133163145 is about 11539.6336596965. The cubic root of 133163145 is about 510.6555008405.

It can be divided in two parts, 13316 and 3145, that added together give a palindrome (16461).

The spelling of 133163145 in words is "one hundred thirty-three million, one hundred sixty-three thousand, one hundred forty-five".