54381881 has 2 divisors, whose sum is σ = 54381882. Its totient is φ = 54381880.

The previous prime is 54381863. The next prime is 54381883. The reversal of 54381881 is 18818345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53421481 + 960400 = 7309^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 54381881 - 2¹⁰ = 54380857 is a prime.

It is a super-2 number, since 2×54381881² = 5914777962196322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 54381883, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (54381883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27190940 + 27190941.

It is an arithmetic number, because the mean of its divisors is an integer number (27190941).

Almost surely, 2^54381881 is an apocalyptic number.

It is an amenable number.

54381881 is a deficient number, since it is larger than the sum of its proper divisors (1).

54381881 is an equidigital number, since it uses as much as digits as its factorization.

54381881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 38.

The square root of 54381881 is about 7374.4071626131. The cubic root of 54381881 is about 378.8652226707.

The spelling of 54381881 in words is "fifty-four million, three hundred eighty-one thousand, eight hundred eighty-one".