133240549 has 8 divisors (see below), whose sum is σ = 145456472. Its totient is φ = 121305600.

The previous prime is 133240537. The next prime is 133240567. The reversal of 133240549 is 945042331.

It can be written as a sum of positive squares in 4 ways, for example, as 1404225 + 131836324 = 1185^2 + 11482^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-133240549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133240549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133240519) 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, 69252 + ... + 71149.

It is an arithmetic number, because the mean of its divisors is an integer number (18182059).

Almost surely, 2^133240549 is an apocalyptic number.

It is an amenable number.

133240549 is a deficient number, since it is larger than the sum of its proper divisors (12215923).

133240549 is a wasteful number, since it uses less digits than its factorization.

133240549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140487.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 133240549 is about 11542.9870051040. The cubic root of 133240549 is about 510.7544249141.

The spelling of 133240549 in words is "one hundred thirty-three million, two hundred forty thousand, five hundred forty-nine".