54991771 has 2 divisors, whose sum is σ = 54991772. Its totient is φ = 54991770.

The previous prime is 54991759. The next prime is 54991777. The reversal of 54991771 is 17719945.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54991771 - 2²³ = 46603163 is a prime.

It is not a weakly prime, because it can be changed into another prime (54991777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27495885 + 27495886.

It is an arithmetic number, because the mean of its divisors is an integer number (27495886).

Almost surely, 2^54991771 is an apocalyptic number.

54991771 is a deficient number, since it is larger than the sum of its proper divisors (1).

54991771 is an equidigital number, since it uses as much as digits as its factorization.

54991771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 54991771 is about 7415.6436672753. The cubic root of 54991771 is about 380.2762787691.

The spelling of 54991771 in words is "fifty-four million, nine hundred ninety-one thousand, seven hundred seventy-one".