54563191 has 2 divisors, whose sum is σ = 54563192. Its totient is φ = 54563190.

The previous prime is 54563189. The next prime is 54563209. The reversal of 54563191 is 19136545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54563191 - 2¹ = 54563189 is a prime.

Together with 54563189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54563101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27281595 + 27281596.

It is an arithmetic number, because the mean of its divisors is an integer number (27281596).

Almost surely, 2^54563191 is an apocalyptic number.

54563191 is a deficient number, since it is larger than the sum of its proper divisors (1).

54563191 is an equidigital number, since it uses as much as digits as its factorization.

54563191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The square root of 54563191 is about 7386.6901248123. The cubic root of 54563191 is about 379.2858030383.

It can be divided in two parts, 545 and 63191, that added together give a palindrome (63736).

The spelling of 54563191 in words is "fifty-four million, five hundred sixty-three thousand, one hundred ninety-one".