33223220 has 12 divisors (see below), whose sum is σ = 69768804. Its totient is φ = 13289280.

The previous prime is 33223217. The next prime is 33223261. The reversal of 33223220 is 2232233.

It can be written as a sum of positive squares in 2 ways, for example, as 8042896 + 25180324 = 2836^2 + 5018^2 .

It is a super-2 number, since 2×33223220² = 2207564694336800, which contains 22 as substring.

It is a congruent number.

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, 830561 + ... + 830600.

It is an arithmetic number, because the mean of its divisors is an integer number (5814067).

Almost surely, 2^33223220 is an apocalyptic number.

It is an amenable number.

33223220 is an abundant number, since it is smaller than the sum of its proper divisors (36545584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33223220 is a wasteful number, since it uses less digits than its factorization.

33223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661170 (or 1661168 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 33223220 is about 5763.9587090818. The cubic root of 33223220 is about 321.4750264191.

Adding to 33223220 its reverse (2232233), we get a palindrome (35455453).

It can be divided in two parts, 3 and 3223220, that added together give a palindrome (3223223).

The spelling of 33223220 in words is "thirty-three million, two hundred twenty-three thousand, two hundred twenty".