33545421 has 96 divisors (see below), whose sum is σ = 65065728. Its totient is φ = 16796160.

The previous prime is 33545401. The next prime is 33545423. The reversal of 33545421 is 12454533.

33545421 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 33545421 - 2⁵ = 33545389 is a prime.

It is a super-2 number, since 2×33545421² = 2250590540134482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33545423) 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 95 ways as a sum of consecutive naturals, for example, 818161 + ... + 818201.

It is an arithmetic number, because the mean of its divisors is an integer number (677768).

Almost surely, 2^33545421 is an apocalyptic number.

It is an amenable number.

33545421 is a deficient number, since it is larger than the sum of its proper divisors (31520307).

33545421 is a wasteful number, since it uses less digits than its factorization.

33545421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 101 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 33545421 is about 5791.8408990579. The cubic root of 33545421 is about 322.5109136382.

Adding to 33545421 its reverse (12454533), we get a palindrome (45999954).

The spelling of 33545421 in words is "thirty-three million, five hundred forty-five thousand, four hundred twenty-one".