55739881 has 2 divisors, whose sum is σ = 55739882. Its totient is φ = 55739880.

The previous prime is 55739861. The next prime is 55739897. The reversal of 55739881 is 18893755.

55739881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53890281 + 1849600 = 7341^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 55739881 - 2¹¹ = 55737833 is a prime.

It is a super-2 number, since 2×55739881² = 6213868667788322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55739861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27869940 + 27869941.

It is an arithmetic number, because the mean of its divisors is an integer number (27869941).

Almost surely, 2^55739881 is an apocalyptic number.

It is an amenable number.

55739881 is a deficient number, since it is larger than the sum of its proper divisors (1).

55739881 is an equidigital number, since it uses as much as digits as its factorization.

55739881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 46.

The square root of 55739881 is about 7465.9146124236. The cubic root of 55739881 is about 381.9929482539.

It can be divided in two parts, 55 and 739881, that added together give a triangular number (739936 = T₁₂₁₆).

The spelling of 55739881 in words is "fifty-five million, seven hundred thirty-nine thousand, eight hundred eighty-one".