54117881 has 2 divisors, whose sum is σ = 54117882. Its totient is φ = 54117880.

The previous prime is 54117839. The next prime is 54117907. The reversal of 54117881 is 18871145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42042256 + 12075625 = 6484^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54117881 is a prime.

It is a super-2 number, since 2×54117881² = 5857490087860322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (54117181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27058940 + 27058941.

It is an arithmetic number, because the mean of its divisors is an integer number (27058941).

Almost surely, 2^54117881 is an apocalyptic number.

It is an amenable number.

54117881 is a deficient number, since it is larger than the sum of its proper divisors (1).

54117881 is an equidigital number, since it uses as much as digits as its factorization.

54117881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 35.

The square root of 54117881 is about 7356.4856419353. The cubic root of 54117881 is about 378.2511535082.

The spelling of 54117881 in words is "fifty-four million, one hundred seventeen thousand, eight hundred eighty-one".