33155145 has 24 divisors (see below), whose sum is σ = 59025096. Its totient is φ = 17203968.

The previous prime is 33155141. The next prime is 33155159. The reversal of 33155145 is 54155133.

It can be written as a sum of positive squares in 4 ways, for example, as 1750329 + 31404816 = 1323^2 + 5604^2 .

It is not a de Polignac number, because 33155145 - 2² = 33155141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (33155141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8292 + ... + 11621.

It is an arithmetic number, because the mean of its divisors is an integer number (2459379).

Almost surely, 2^33155145 is an apocalyptic number.

It is an amenable number.

33155145 is a deficient number, since it is larger than the sum of its proper divisors (25869951).

33155145 is a wasteful number, since it uses less digits than its factorization.

33155145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19961 (or 19958 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 33155145 is about 5758.0504513246. The cubic root of 33155145 is about 321.2553068309.

The spelling of 33155145 in words is "thirty-three million, one hundred fifty-five thousand, one hundred forty-five".