33225421 has 2 divisors, whose sum is σ = 33225422. Its totient is φ = 33225420.

The previous prime is 33225407. The next prime is 33225427. The reversal of 33225421 is 12452233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26522500 + 6702921 = 5150^2 + 2589^2 .

It is a cyclic number.

It is not a de Polignac number, because 33225421 - 2⁹ = 33224909 is a prime.

It is a super-2 number, since 2×33225421² = 2207857201254482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33225392 and 33225401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33225427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16612710 + 16612711.

It is an arithmetic number, because the mean of its divisors is an integer number (16612711).

Almost surely, 2^33225421 is an apocalyptic number.

It is an amenable number.

33225421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33225421 is an equidigital number, since it uses as much as digits as its factorization.

33225421 is an evil number, because the sum of its binary digits is even.

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

The square root of 33225421 is about 5764.1496337274. The cubic root of 33225421 is about 321.4821253789.

Adding to 33225421 its reverse (12452233), we get a palindrome (45677654).

The spelling of 33225421 in words is "thirty-three million, two hundred twenty-five thousand, four hundred twenty-one".