33220560 has 80 divisors (see below), whose sum is σ = 104118336. Its totient is φ = 8761344.

The previous prime is 33220549. The next prime is 33220571. The reversal of 33220560 is 6502233.

It is an interprime number because it is at equal distance from previous prime (33220549) and next prime (33220571).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×33220560² = 2207211213427200, 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 15 ways as a sum of consecutive naturals, for example, 22567 + ... + 23993.

Almost surely, 2^33220560 is an apocalyptic number.

33220560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33220560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52059168).

33220560 is an abundant number, since it is smaller than the sum of its proper divisors (70897776).

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

33220560 is a wasteful number, since it uses less digits than its factorization.

33220560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 33220560 is about 5763.7279602702. The cubic root of 33220560 is about 321.4664466127.

Adding to 33220560 its reverse (6502233), we get a palindrome (39722793).

The spelling of 33220560 in words is "thirty-three million, two hundred twenty thousand, five hundred sixty".