33225520 has 20 divisors (see below), whose sum is σ = 77249520. Its totient is φ = 13290176.

The previous prime is 33225499. The next prime is 33225527. The reversal of 33225520 is 2552233.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×33225520² = 2207870358540800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33225491 and 33225500.

It is not an unprimeable number, because it can be changed into a prime (33225527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207580 + ... + 207739.

It is an arithmetic number, because the mean of its divisors is an integer number (3862476).

Almost surely, 2^33225520 is an apocalyptic number.

It is an amenable number.

33225520 is an abundant number, since it is smaller than the sum of its proper divisors (44024000).

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

33225520 is a wasteful number, since it uses less digits than its factorization.

33225520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415332 (or 415326 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 33225520 is about 5764.1582212844. The cubic root of 33225520 is about 321.4824446796.

Adding to 33225520 its reverse (2552233), we get a palindrome (35777753).

It can be divided in two parts, 332 and 25520, that added together give a palindrome (25852).

The spelling of 33225520 in words is "thirty-three million, two hundred twenty-five thousand, five hundred twenty".