33421919 has 4 divisors (see below), whose sum is σ = 33511896. Its totient is φ = 33331944.

The previous prime is 33421889. The next prime is 33421939. The reversal of 33421919 is 91912433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91912433 = 997 ⋅92189.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33421919 is a prime.

It is a super-2 number, since 2×33421919² = 2234049339285122, 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 (33421939) 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, 44429 + ... + 45174.

It is an arithmetic number, because the mean of its divisors is an integer number (8377974).

Almost surely, 2^33421919 is an apocalyptic number.

33421919 is a deficient number, since it is larger than the sum of its proper divisors (89977).

33421919 is an equidigital number, since it uses as much as digits as its factorization.

33421919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89976.

The product of its digits is 5832, while the sum is 32.

The square root of 33421919 is about 5781.1693453833. The cubic root of 33421919 is about 322.1146377567.

The spelling of 33421919 in words is "thirty-three million, four hundred twenty-one thousand, nine hundred nineteen".