133161645 has 16 divisors (see below), whose sum is σ = 218256192. Its totient is φ = 69287040.

The previous prime is 133161641. The next prime is 133161653. The reversal of 133161645 is 546161331.

It is not a de Polignac number, because 133161645 - 2² = 133161641 is a prime.

It is a super-3 number, since 3×133161645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133161641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107647 + ... + 108876.

It is an arithmetic number, because the mean of its divisors is an integer number (13641012).

Almost surely, 2^133161645 is an apocalyptic number.

133161645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133161645 is a deficient number, since it is larger than the sum of its proper divisors (85094547).

133161645 is a wasteful number, since it uses less digits than its factorization.

133161645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216572.

The product of its digits is 6480, while the sum is 30.

The square root of 133161645 is about 11539.5686661157. The cubic root of 133161645 is about 510.6535834278.

The spelling of 133161645 in words is "one hundred thirty-three million, one hundred sixty-one thousand, six hundred forty-five".