33216812257 has 2 divisors, whose sum is σ = 33216812258. Its totient is φ = 33216812256.

The previous prime is 33216812249. The next prime is 33216812287. The reversal of 33216812257 is 75221861233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20770286161 + 12446526096 = 144119^2 + 111564^2 .

It is a cyclic number.

It is not a de Polignac number, because 33216812257 - 2³ = 33216812249 is a prime.

It is a super-2 number, since 2×33216812257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33216812207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16608406128 + 16608406129.

It is an arithmetic number, because the mean of its divisors is an integer number (16608406129).

Almost surely, 2^33216812257 is an apocalyptic number.

It is an amenable number.

33216812257 is a deficient number, since it is larger than the sum of its proper divisors (1).

33216812257 is an equidigital number, since it uses as much as digits as its factorization.

33216812257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The spelling of 33216812257 in words is "thirty-three billion, two hundred sixteen million, eight hundred twelve thousand, two hundred fifty-seven".