133031645 has 8 divisors (see below), whose sum is σ = 161219160. Its totient is φ = 105371200.

The previous prime is 133031629. The next prime is 133031651. The reversal of 133031645 is 546130331.

It can be written as a sum of positive squares in 4 ways, for example, as 18156121 + 114875524 = 4261^2 + 10718^2 .

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

It is not a de Polignac number, because 133031645 - 2⁴ = 133031629 is a prime.

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, 131210 + ... + 132219.

It is an arithmetic number, because the mean of its divisors is an integer number (20152395).

Almost surely, 2^133031645 is an apocalyptic number.

It is an amenable number.

133031645 is a deficient number, since it is larger than the sum of its proper divisors (28187515).

133031645 is a wasteful number, since it uses less digits than its factorization.

133031645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263535.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 133031645 is about 11533.9344978199. The cubic root of 133031645 is about 510.4873529278.

Adding to 133031645 its reverse (546130331), we get a palindrome (679161976).

The spelling of 133031645 in words is "one hundred thirty-three million, thirty-one thousand, six hundred forty-five".