33550000 has 120 divisors (see below), whose sum is σ = 90087984. Its totient is φ = 12000000.

The previous prime is 33549983. The next prime is 33550003. The reversal of 33550000 is 5533.

It is a happy number.

It is a super-2 number, since 2×33550000² = 2251205000000000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33550003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549970 + ... + 550030.

Almost surely, 2^33550000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45043992).

33550000 is an abundant number, since it is smaller than the sum of its proper divisors (56537984).

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

33550000 is an equidigital number, since it uses as much as digits as its factorization.

33550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 16.

The square root of 33550000 is about 5792.2361830298. The cubic root of 33550000 is about 322.5255873775.

Adding to 33550000 its reverse (5533), we get a palindrome (33555533).

The spelling of 33550000 in words is "thirty-three million, five hundred fifty thousand".