133236445 has 8 divisors (see below), whose sum is σ = 164205144. Its totient is φ = 103708224.

The previous prime is 133236427. The next prime is 133236451. The reversal of 133236445 is 544632331.

133236445 = 406² + 407² + ... + 775².

It can be written as a sum of positive squares in 4 ways, for example, as 42263001 + 90973444 = 6501^2 + 9538^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 133236445 - 2⁹ = 133235933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359914 + ... + 360283.

It is an arithmetic number, because the mean of its divisors is an integer number (20525643).

Almost surely, 2^133236445 is an apocalyptic number.

It is an amenable number.

133236445 is a deficient number, since it is larger than the sum of its proper divisors (30968699).

133236445 is an equidigital number, since it uses as much as digits as its factorization.

133236445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720239.

The product of its digits is 25920, while the sum is 31.

The square root of 133236445 is about 11542.8092334579. The cubic root of 133236445 is about 510.7491808707.

Adding to 133236445 its reverse (544632331), we get a palindrome (677868776).

The spelling of 133236445 in words is "one hundred thirty-three million, two hundred thirty-six thousand, four hundred forty-five".