54333991 has 2 divisors, whose sum is σ = 54333992. Its totient is φ = 54333990.

The previous prime is 54333971. The next prime is 54333997. The reversal of 54333991 is 19933345.

54333991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54333991 - 2¹⁵ = 54301223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54333991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54333997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27166995 + 27166996.

It is an arithmetic number, because the mean of its divisors is an integer number (27166996).

Almost surely, 2^54333991 is an apocalyptic number.

54333991 is a deficient number, since it is larger than the sum of its proper divisors (1).

54333991 is an equidigital number, since it uses as much as digits as its factorization.

54333991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 37.

The square root of 54333991 is about 7371.1594067691. The cubic root of 54333991 is about 378.7539773824.

The spelling of 54333991 in words is "fifty-four million, three hundred thirty-three thousand, nine hundred ninety-one".