33421305 has 16 divisors (see below), whose sum is σ = 53636544. Its totient is φ = 17770560.

The previous prime is 33421291. The next prime is 33421307. The reversal of 33421305 is 50312433.

33421305 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 33421305 - 2¹⁰ = 33420281 is a prime.

It is a super-2 number, since 2×33421305² = 2233967255806050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33421307) 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, 1995 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (3352284).

Almost surely, 2^33421305 is an apocalyptic number.

It is an amenable number.

33421305 is a deficient number, since it is larger than the sum of its proper divisors (20215239).

33421305 is a wasteful number, since it uses less digits than its factorization.

33421305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 33421305 is about 5781.1162416959. The cubic root of 33421305 is about 322.1126652029.

Adding to 33421305 its reverse (50312433), we get a palindrome (83733738).

The spelling of 33421305 in words is "thirty-three million, four hundred twenty-one thousand, three hundred five".