33220401 has 4 divisors (see below), whose sum is σ = 44293872. Its totient is φ = 22146932.

The previous prime is 33220393. The next prime is 33220423. The reversal of 33220401 is 10402233.

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 cyclic number.

It is not a de Polignac number, because 33220401 - 2³ = 33220393 is a prime.

It is a super-2 number, since 2×33220401² = 2207190085201602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33220001) 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, 5536731 + ... + 5536736.

It is an arithmetic number, because the mean of its divisors is an integer number (11073468).

Almost surely, 2^33220401 is an apocalyptic number.

It is an amenable number.

33220401 is a deficient number, since it is larger than the sum of its proper divisors (11073471).

33220401 is a wasteful number, since it uses less digits than its factorization.

33220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11073470.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 33220401 is about 5763.7141670975. The cubic root of 33220401 is about 321.4659337451.

Adding to 33220401 its reverse (10402233), we get a palindrome (43622634).

The spelling of 33220401 in words is "thirty-three million, two hundred twenty thousand, four hundred one".