133205501 has 16 divisors (see below), whose sum is σ = 157344768. Its totient is φ = 111172800.

The previous prime is 133205467. The next prime is 133205503. The reversal of 133205501 is 105502331.

It is a cyclic number.

It is not a de Polignac number, because 133205501 - 2¹⁸ = 132943357 is a prime.

It is a super-2 number, since 2×133205501² = 35487410993322002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133205503) 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, 24875 + ... + 29751.

It is an arithmetic number, because the mean of its divisors is an integer number (9834048).

Almost surely, 2^133205501 is an apocalyptic number.

133205501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133205501 is a deficient number, since it is larger than the sum of its proper divisors (24139267).

133205501 is a wasteful number, since it uses less digits than its factorization.

133205501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 133205501 is about 11541.4687540191. The cubic root of 133205501 is about 510.7096375201.

Adding to 133205501 its reverse (105502331), we get a palindrome (238707832).

The spelling of 133205501 in words is "one hundred thirty-three million, two hundred five thousand, five hundred one".