33313421 has 8 divisors (see below), whose sum is σ = 35411904. Its totient is φ = 31230400.

The previous prime is 33313409. The next prime is 33313429. The reversal of 33313421 is 12431333.

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

It is a cyclic number.

It is not a de Polignac number, because 33313421 - 2¹⁰ = 33312397 is a prime.

It is a super-2 number, since 2×33313421² = 2219568037446482, 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 = 33313393 and 33313402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33313429) 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, 746 + ... + 8196.

It is an arithmetic number, because the mean of its divisors is an integer number (4426488).

Almost surely, 2^33313421 is an apocalyptic number.

It is an amenable number.

33313421 is a deficient number, since it is larger than the sum of its proper divisors (2098483).

33313421 is a wasteful number, since it uses less digits than its factorization.

33313421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731.

The product of its digits is 648, while the sum is 20.

The square root of 33313421 is about 5771.7779756328. Note that the first 3 decimals coincide. The cubic root of 33313421 is about 321.7656982822.

Adding to 33313421 its reverse (12431333), we get a palindrome (45744754).

The spelling of 33313421 in words is "thirty-three million, three hundred thirteen thousand, four hundred twenty-one".