54222191 has 2 divisors, whose sum is σ = 54222192. Its totient is φ = 54222190.

The previous prime is 54222173. The next prime is 54222221. The reversal of 54222191 is 19122245.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54222191 - 2¹⁴ = 54205807 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54222191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54222151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27111095 + 27111096.

It is an arithmetic number, because the mean of its divisors is an integer number (27111096).

Almost surely, 2^54222191 is an apocalyptic number.

54222191 is a deficient number, since it is larger than the sum of its proper divisors (1).

54222191 is an equidigital number, since it uses as much as digits as its factorization.

54222191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 54222191 is about 7363.5718914125. The cubic root of 54222191 is about 378.4940187416.

The spelling of 54222191 in words is "fifty-four million, two hundred twenty-two thousand, one hundred ninety-one".