33145405 has 32 divisors (see below), whose sum is σ = 44323200. Its totient is φ = 23692032.

The previous prime is 33145397. The next prime is 33145421. The reversal of 33145405 is 50454133.

It is a cyclic number.

It is not a de Polignac number, because 33145405 - 2³ = 33145397 is a prime.

It is a super-2 number, since 2×33145405² = 2197235745228050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33145405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145902 + ... + 146128.

It is an arithmetic number, because the mean of its divisors is an integer number (1385100).

Almost surely, 2^33145405 is an apocalyptic number.

It is an amenable number.

33145405 is a deficient number, since it is larger than the sum of its proper divisors (11177795).

33145405 is a wasteful number, since it uses less digits than its factorization.

33145405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 33145405 is about 5757.2046168258. The cubic root of 33145405 is about 321.2238453173.

Adding to 33145405 its reverse (50454133), we get a palindrome (83599538).

The spelling of 33145405 in words is "thirty-three million, one hundred forty-five thousand, four hundred five".