33240425 has 24 divisors (see below), whose sum is σ = 42622272. Its totient is φ = 25704000.

The previous prime is 33240391. The next prime is 33240433. The reversal of 33240425 is 52404233.

It is a de Polignac number, because none of the positive numbers 2^k-33240425 is a prime.

It is a super-2 number, since 2×33240425² = 2209851708361250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 33240425.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108122 + ... + 108428.

It is an arithmetic number, because the mean of its divisors is an integer number (1775928).

Almost surely, 2^33240425 is an apocalyptic number.

It is an amenable number.

33240425 is a deficient number, since it is larger than the sum of its proper divisors (9381847).

33240425 is a wasteful number, since it uses less digits than its factorization.

33240425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 33240425 is about 5765.4509797587. The cubic root of 33240425 is about 321.5305099369.

Adding to 33240425 its reverse (52404233), we get a palindrome (85644658).

The spelling of 33240425 in words is "thirty-three million, two hundred forty thousand, four hundred twenty-five".