133640265 has 48 divisors (see below), whose sum is σ = 243230400. Its totient is φ = 62536320.

The previous prime is 133640261. The next prime is 133640291. The reversal of 133640265 is 562046331.

It is not a de Polignac number, because 133640265 - 2² = 133640261 is a prime.

It is a super-3 number, since 3×133640265³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (133640261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51366 + ... + 53904.

It is an arithmetic number, because the mean of its divisors is an integer number (5067300).

Almost surely, 2^133640265 is an apocalyptic number.

133640265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133640265 is a deficient number, since it is larger than the sum of its proper divisors (109590135).

133640265 is a wasteful number, since it uses less digits than its factorization.

133640265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598 (or 2587 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 133640265 is about 11560.2882749523. The cubic root of 133640265 is about 511.2646622330.

Adding to 133640265 its reverse (562046331), we get a palindrome (695686596).

The spelling of 133640265 in words is "one hundred thirty-three million, six hundred forty thousand, two hundred sixty-five".