55582381 has 2 divisors, whose sum is σ = 55582382. Its totient is φ = 55582380.

The previous prime is 55582343. The next prime is 55582403. The reversal of 55582381 is 18328555.

55582381 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., 53421481 + 2160900 = 7309^2 + 1470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55582381 is a prime.

It is a super-2 number, since 2×55582381² = 6178802155258322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55582381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55582301) 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, 27791190 + 27791191.

It is an arithmetic number, because the mean of its divisors is an integer number (27791191).

Almost surely, 2^55582381 is an apocalyptic number.

It is an amenable number.

55582381 is a deficient number, since it is larger than the sum of its proper divisors (1).

55582381 is an equidigital number, since it uses as much as digits as its factorization.

55582381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 37.

The square root of 55582381 is about 7455.3592133445. The cubic root of 55582381 is about 381.6328192388.

The spelling of 55582381 in words is "fifty-five million, five hundred eighty-two thousand, three hundred eighty-one".