133540365 has 16 divisors (see below), whose sum is σ = 244188288. Its totient is φ = 61046976.

The previous prime is 133540361. The next prime is 133540409. The reversal of 133540365 is 563045331.

It is a happy number.

It is not a de Polignac number, because 133540365 - 2² = 133540361 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133540361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635802 + ... + 636011.

It is an arithmetic number, because the mean of its divisors is an integer number (15261768).

Almost surely, 2^133540365 is an apocalyptic number.

133540365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133540365 is a deficient number, since it is larger than the sum of its proper divisors (110647923).

133540365 is a wasteful number, since it uses less digits than its factorization.

133540365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271828.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 133540365 is about 11555.9666406580. The cubic root of 133540365 is about 511.1372353884.

Adding to 133540365 its reverse (563045331), we get a palindrome (696585696).

The spelling of 133540365 in words is "one hundred thirty-three million, five hundred forty thousand, three hundred sixty-five".