33225918 has 16 divisors (see below), whose sum is σ = 72493056. Its totient is φ = 10068440.

The previous prime is 33225911. The next prime is 33225943. The reversal of 33225918 is 81952233.

It is a super-2 number, since 2×33225918² = 2207923253885448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33225911) 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 7 ways as a sum of consecutive naturals, for example, 251646 + ... + 251777.

It is an arithmetic number, because the mean of its divisors is an integer number (4530816).

Almost surely, 2^33225918 is an apocalyptic number.

33225918 is an abundant number, since it is smaller than the sum of its proper divisors (39267138).

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

33225918 is a wasteful number, since it uses less digits than its factorization.

33225918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503439.

The product of its digits is 12960, while the sum is 33.

The square root of 33225918 is about 5764.1927448690. The cubic root of 33225918 is about 321.4837283265.

It can be divided in two parts, 33225 and 918, that added together give a palindrome (34143).

The spelling of 33225918 in words is "thirty-three million, two hundred twenty-five thousand, nine hundred eighteen".