33428251 has 2 divisors, whose sum is σ = 33428252. Its totient is φ = 33428250.

The previous prime is 33428189. The next prime is 33428257. The reversal of 33428251 is 15282433.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 33428251 - 2⁷ = 33428123 is a prime.

It is a super-2 number, since 2×33428251² = 2234895929838002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33428257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16714125 + 16714126.

It is an arithmetic number, because the mean of its divisors is an integer number (16714126).

Almost surely, 2^33428251 is an apocalyptic number.

33428251 is a deficient number, since it is larger than the sum of its proper divisors (1).

33428251 is an equidigital number, since it uses as much as digits as its factorization.

33428251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 33428251 is about 5781.7169595199. The cubic root of 33428251 is about 322.1349787101.

The spelling of 33428251 in words is "thirty-three million, four hundred twenty-eight thousand, two hundred fifty-one".