33420451 has 2 divisors, whose sum is σ = 33420452. Its totient is φ = 33420450.

The previous prime is 33420407. The next prime is 33420461. The reversal of 33420451 is 15402433.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 33420451 - 2⁷ = 33420323 is a prime.

It is a super-2 number, since 2×33420451² = 2233853090086802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33420461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16710225 + 16710226.

It is an arithmetic number, because the mean of its divisors is an integer number (16710226).

Almost surely, 2^33420451 is an apocalyptic number.

33420451 is a deficient number, since it is larger than the sum of its proper divisors (1).

33420451 is an equidigital number, since it uses as much as digits as its factorization.

33420451 is an odious number, because the sum of its binary digits is odd.

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

The square root of 33420451 is about 5781.0423800557. The cubic root of 33420451 is about 322.1099215782.

Adding to 33420451 its reverse (15402433), we get a palindrome (48822884).

The spelling of 33420451 in words is "thirty-three million, four hundred twenty thousand, four hundred fifty-one".