133631205 has 16 divisors (see below), whose sum is σ = 214013184. Its totient is φ = 71202240.

The previous prime is 133631167. The next prime is 133631209. The reversal of 133631205 is 502136331.

It is a happy number.

It is not a de Polignac number, because 133631205 - 2¹¹ = 133629157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133631209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14847 + ... + 22083.

It is an arithmetic number, because the mean of its divisors is an integer number (13375824).

Almost surely, 2^133631205 is an apocalyptic number.

133631205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133631205 is a deficient number, since it is larger than the sum of its proper divisors (80381979).

133631205 is a wasteful number, since it uses less digits than its factorization.

133631205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8476.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 133631205 is about 11559.8964095705. The cubic root of 133631205 is about 511.2531084234.

Adding to 133631205 its reverse (502136331), we get a palindrome (635767536).

The spelling of 133631205 in words is "one hundred thirty-three million, six hundred thirty-one thousand, two hundred five".