55868881 has 2 divisors, whose sum is σ = 55868882. Its totient is φ = 55868880.

The previous prime is 55868867. The next prime is 55868893. The reversal of 55868881 is 18886855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33825856 + 22043025 = 5816^2 + 4695^2 .

It is a cyclic number.

It is not a de Polignac number, because 55868881 - 2⁵ = 55868849 is a prime.

It is a super-2 number, since 2×55868881² = 6242663728384322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55868801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27934440 + 27934441.

It is an arithmetic number, because the mean of its divisors is an integer number (27934441).

Almost surely, 2^55868881 is an apocalyptic number.

It is an amenable number.

55868881 is a deficient number, since it is larger than the sum of its proper divisors (1).

55868881 is an equidigital number, since it uses as much as digits as its factorization.

55868881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 614400, while the sum is 49.

The square root of 55868881 is about 7474.5488827086. The cubic root of 55868881 is about 382.2874060335.

The spelling of 55868881 in words is "fifty-five million, eight hundred sixty-eight thousand, eight hundred eighty-one".