133224145 has 8 divisors (see below), whose sum is σ = 160753320. Its totient is φ = 105989760.

The previous prime is 133224131. The next prime is 133224149. The reversal of 133224145 is 541422331.

It can be written as a sum of positive squares in 4 ways, for example, as 7268416 + 125955729 = 2696^2 + 11223^2 .

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

It is not a de Polignac number, because 133224145 - 2⁷ = 133224017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133224149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72700 + ... + 74509.

It is an arithmetic number, because the mean of its divisors is an integer number (20094165).

Almost surely, 2^133224145 is an apocalyptic number.

It is an amenable number.

133224145 is a deficient number, since it is larger than the sum of its proper divisors (27529175).

133224145 is a wasteful number, since it uses less digits than its factorization.

133224145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147395.

The product of its digits is 2880, while the sum is 25.

The square root of 133224145 is about 11542.2764219196. The cubic root of 133224145 is about 510.7334634288.

Adding to 133224145 its reverse (541422331), we get a palindrome (674646476).

The spelling of 133224145 in words is "one hundred thirty-three million, two hundred twenty-four thousand, one hundred forty-five".