33421403 has 4 divisors (see below), whose sum is σ = 33554808. Its totient is φ = 33288000.

The previous prime is 33421387. The next prime is 33421411. The reversal of 33421403 is 30412433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30412433 = 271 ⋅112223.

It is a cyclic number.

It is not a de Polignac number, because 33421403 - 2⁴ = 33421387 is a prime.

It is a super-2 number, since 2×33421403² = 2233980356976818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33421433) 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, 66326 + ... + 66827.

It is an arithmetic number, because the mean of its divisors is an integer number (8388702).

Almost surely, 2^33421403 is an apocalyptic number.

33421403 is a deficient number, since it is larger than the sum of its proper divisors (133405).

33421403 is a wasteful number, since it uses less digits than its factorization.

33421403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133404.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 33421403 is about 5781.1247175615. The cubic root of 33421403 is about 322.1129800421.

Adding to 33421403 its reverse (30412433), we get a palindrome (63833836).

The spelling of 33421403 in words is "thirty-three million, four hundred twenty-one thousand, four hundred three".