33412421 has 4 divisors (see below), whose sum is σ = 38185632. Its totient is φ = 28639212.

The previous prime is 33412411. The next prime is 33412427. The reversal of 33412421 is 12421433.

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.

It is a de Polignac number, because none of the positive numbers 2^k-33412421 is a prime.

It is a super-2 number, since 2×33412421² = 2232779754162482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33412393 and 33412402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33412427) 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, 2386595 + ... + 2386608.

It is an arithmetic number, because the mean of its divisors is an integer number (9546408).

Almost surely, 2^33412421 is an apocalyptic number.

It is an amenable number.

33412421 is a deficient number, since it is larger than the sum of its proper divisors (4773211).

33412421 is an equidigital number, since it uses as much as digits as its factorization.

33412421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4773210.

The product of its digits is 576, while the sum is 20.

The square root of 33412421 is about 5780.3478269045. The cubic root of 33412421 is about 322.0841215089.

Adding to 33412421 its reverse (12421433), we get a palindrome (45833854).

It can be divided in two parts, 33412 and 421, that added together give a palindrome (33833).

The spelling of 33412421 in words is "thirty-three million, four hundred twelve thousand, four hundred twenty-one".