33991051 has 2 divisors, whose sum is σ = 33991052. Its totient is φ = 33991050.

The previous prime is 33991003. The next prime is 33991081. The reversal of 33991051 is 15019933.

It is a strong prime.

It is an emirp because it is prime and its reverse (15019933) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33991051 - 2¹¹ = 33989003 is a prime.

It is not a weakly prime, because it can be changed into another prime (33991081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16995525 + 16995526.

It is an arithmetic number, because the mean of its divisors is an integer number (16995526).

Almost surely, 2^33991051 is an apocalyptic number.

33991051 is a deficient number, since it is larger than the sum of its proper divisors (1).

33991051 is an equidigital number, since it uses as much as digits as its factorization.

33991051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 33991051 is about 5830.1844739253. The cubic root of 33991051 is about 323.9327548043.

The spelling of 33991051 in words is "thirty-three million, nine hundred ninety-one thousand, fifty-one".