33010421 has 4 divisors (see below), whose sum is σ = 33078144. Its totient is φ = 32942700.

The previous prime is 33010399. The next prime is 33010433. The reversal of 33010421 is 12401033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12401033 = 59 ⋅210187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33010421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33010396 and 33010405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33000421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33125 + ... + 34106.

It is an arithmetic number, because the mean of its divisors is an integer number (8269536).

Almost surely, 2^33010421 is an apocalyptic number.

It is an amenable number.

33010421 is a deficient number, since it is larger than the sum of its proper divisors (67723).

33010421 is an equidigital number, since it uses as much as digits as its factorization.

33010421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67722.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 33010421 is about 5745.4696065683. The cubic root of 33010421 is about 320.7871927949.

Adding to 33010421 its reverse (12401033), we get a palindrome (45411454).

The spelling of 33010421 in words is "thirty-three million, ten thousand, four hundred twenty-one".