33221425 has 24 divisors (see below), whose sum is σ = 42497280. Its totient is φ = 25752000.

The previous prime is 33221423. The next prime is 33221431. The reversal of 33221425 is 52412233.

It is not a de Polignac number, because 33221425 - 2¹ = 33221423 is a prime.

It is a super-2 number, since 2×33221425² = 2207326158061250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33221396 and 33221405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221423) 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, 148864 + ... + 149086.

It is an arithmetic number, because the mean of its divisors is an integer number (1770720).

Almost surely, 2^33221425 is an apocalyptic number.

It is an amenable number.

33221425 is a deficient number, since it is larger than the sum of its proper divisors (9275855).

33221425 is a wasteful number, since it uses less digits than its factorization.

33221425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 388 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 33221425 is about 5763.8029980214. The cubic root of 33221425 is about 321.4692367128.

Adding to 33221425 its reverse (52412233), we get a palindrome (85633658).

The spelling of 33221425 in words is "thirty-three million, two hundred twenty-one thousand, four hundred twenty-five".