33220500 has 48 divisors (see below), whose sum is σ = 96742464. Its totient is φ = 8858400.

The previous prime is 33220483. The next prime is 33220507. The reversal of 33220500 is 502233.

It is a super-2 number, since 2×33220500² = 2207203240500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 33220500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9574 + ... + 12573.

It is an arithmetic number, because the mean of its divisors is an integer number (2015468).

Almost surely, 2^33220500 is an apocalyptic number.

33220500 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33220500 is an abundant number, since it is smaller than the sum of its proper divisors (63521964).

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

33220500 is a wasteful number, since it uses less digits than its factorization.

33220500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22169 (or 22157 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 33220500 is about 5763.7227553032. The cubic root of 33220500 is about 321.4662530779.

Adding to 33220500 its reverse (502233), we get a palindrome (33722733).

The spelling of 33220500 in words is "thirty-three million, two hundred twenty thousand, five hundred".