54919181 has 2 divisors, whose sum is σ = 54919182. Its totient is φ = 54919180.

The previous prime is 54919159. The next prime is 54919187. The reversal of 54919181 is 18191945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53728900 + 1190281 = 7330^2 + 1091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54919181 is a prime.

It is a super-2 number, since 2×54919181² = 6032232883421522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54919187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27459590 + 27459591.

It is an arithmetic number, because the mean of its divisors is an integer number (27459591).

Almost surely, 2^54919181 is an apocalyptic number.

It is an amenable number.

54919181 is a deficient number, since it is larger than the sum of its proper divisors (1).

54919181 is an equidigital number, since it uses as much as digits as its factorization.

54919181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 54919181 is about 7410.7476680832. The cubic root of 54919181 is about 380.1088815415.

The spelling of 54919181 in words is "fifty-four million, nine hundred nineteen thousand, one hundred eighty-one".