33220228 has 12 divisors (see below), whose sum is σ = 59706892. Its totient is φ = 16161120.

The previous prime is 33220219. The next prime is 33220237. The reversal of 33220228 is 82202233.

It is an interprime number because it is at equal distance from previous prime (33220219) and next prime (33220237).

It can be written as a sum of positive squares in 2 ways, for example, as 17156164 + 16064064 = 4142^2 + 4008^2 .

It is a super-2 number, since 2×33220228² = 2207167096743968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33220199 and 33220208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112083 + ... + 112378.

Almost surely, 2^33220228 is an apocalyptic number.

It is an amenable number.

33220228 is a deficient number, since it is larger than the sum of its proper divisors (26486664).

33220228 is a wasteful number, since it uses less digits than its factorization.

33220228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224502 (or 224500 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 33220228 is about 5763.6991593941. The cubic root of 33220228 is about 321.4653757175.

The spelling of 33220228 in words is "thirty-three million, two hundred twenty thousand, two hundred twenty-eight".