33307421 has 8 divisors (see below), whose sum is σ = 38100864. Its totient is φ = 28522800.

The previous prime is 33307411. The next prime is 33307451. The reversal of 33307421 is 12470333.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33307421 is a prime.

It is a super-2 number, since 2×33307421² = 2218768587342482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33307411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12056 + ... + 14558.

It is an arithmetic number, because the mean of its divisors is an integer number (4762608).

Almost surely, 2^33307421 is an apocalyptic number.

It is an amenable number.

33307421 is a deficient number, since it is larger than the sum of its proper divisors (4793443).

33307421 is a wasteful number, since it uses less digits than its factorization.

33307421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 33307421 is about 5771.2581817139. The cubic root of 33307421 is about 321.7463796408.

Adding to 33307421 its reverse (12470333), we get a palindrome (45777754).

The spelling of 33307421 in words is "thirty-three million, three hundred seven thousand, four hundred twenty-one".