55981337 has 2 divisors, whose sum is σ = 55981338. Its totient is φ = 55981336.

The previous prime is 55981327. The next prime is 55981361. The reversal of 55981337 is 73318955.

It is a happy number.

55981337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55294096 + 687241 = 7436^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 55981337 - 2⁶ = 55981273 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55981294 and 55981303.

It is not a weakly prime, because it can be changed into another prime (55981307) 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, 27990668 + 27990669.

It is an arithmetic number, because the mean of its divisors is an integer number (27990669).

Almost surely, 2^55981337 is an apocalyptic number.

It is an amenable number.

55981337 is a deficient number, since it is larger than the sum of its proper divisors (1).

55981337 is an equidigital number, since it uses as much as digits as its factorization.

55981337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 55981337 is about 7482.0676954970. The cubic root of 55981337 is about 382.5437306004.

The spelling of 55981337 in words is "fifty-five million, nine hundred eighty-one thousand, three hundred thirty-seven".