33225551 has 4 divisors (see below), whose sum is σ = 33300000. Its totient is φ = 33151104.

The previous prime is 33225527. The next prime is 33225557. The reversal of 33225551 is 15552233.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33225551 - 2¹⁸ = 32963407 is a prime.

It is a super-2 number, since 2×33225551² = 2207874478507202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33225551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33225557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36551 + ... + 37448.

It is an arithmetic number, because the mean of its divisors is an integer number (8325000).

Almost surely, 2^33225551 is an apocalyptic number.

33225551 is a deficient number, since it is larger than the sum of its proper divisors (74449).

33225551 is an equidigital number, since it uses as much as digits as its factorization.

33225551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74448.

The product of its digits is 4500, while the sum is 26.

The square root of 33225551 is about 5764.1609103147. The cubic root of 33225551 is about 321.4825446625.

Adding to 33225551 its reverse (15552233), we get a palindrome (48777784).

The spelling of 33225551 in words is "thirty-three million, two hundred twenty-five thousand, five hundred fifty-one".