54971881 has 2 divisors, whose sum is σ = 54971882. Its totient is φ = 54971880.

The previous prime is 54971867. The next prime is 54971929. The reversal of 54971881 is 18817945.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53890281 + 1081600 = 7341^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 54971881 - 2⁹ = 54971369 is a prime.

It is a super-2 number, since 2×54971881² = 6043815401356322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54971801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27485940 + 27485941.

It is an arithmetic number, because the mean of its divisors is an integer number (27485941).

Almost surely, 2^54971881 is an apocalyptic number.

It is an amenable number.

54971881 is a deficient number, since it is larger than the sum of its proper divisors (1).

54971881 is an equidigital number, since it uses as much as digits as its factorization.

54971881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 43.

The square root of 54971881 is about 7414.3024621336. The cubic root of 54971881 is about 380.2304258039.

The spelling of 54971881 in words is "fifty-four million, nine hundred seventy-one thousand, eight hundred eighty-one".