33481421 has 4 divisors (see below), whose sum is σ = 33788700. Its totient is φ = 33174144.

The previous prime is 33481397. The next prime is 33481423. The reversal of 33481421 is 12418433.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11485321 + 21996100 = 3389^2 + 4690^2 .

It is a cyclic number.

It is not a de Polignac number, because 33481421 - 2¹⁰ = 33480397 is a prime.

It is a super-2 number, since 2×33481421² = 2242011104358482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33481423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153476 + ... + 153693.

It is an arithmetic number, because the mean of its divisors is an integer number (8447175).

Almost surely, 2^33481421 is an apocalyptic number.

It is an amenable number.

33481421 is a deficient number, since it is larger than the sum of its proper divisors (307279).

33481421 is a wasteful number, since it uses less digits than its factorization.

33481421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307278.

The product of its digits is 2304, while the sum is 26.

The square root of 33481421 is about 5786.3132476561. The cubic root of 33481421 is about 322.3056810678.

Adding to 33481421 its reverse (12418433), we get a palindrome (45899854).

The spelling of 33481421 in words is "thirty-three million, four hundred eighty-one thousand, four hundred twenty-one".