55444457 has 2 divisors, whose sum is σ = 55444458. Its totient is φ = 55444456.

The previous prime is 55444439. The next prime is 55444469. The reversal of 55444457 is 75444455.

It is a happy number.

55444457 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., 38887696 + 16556761 = 6236^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 55444457 - 2¹⁰ = 55443433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55444457.

It is not a weakly prime, because it can be changed into another prime (55444427) 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, 27722228 + 27722229.

It is an arithmetic number, because the mean of its divisors is an integer number (27722229).

Almost surely, 2^55444457 is an apocalyptic number.

It is an amenable number.

55444457 is a deficient number, since it is larger than the sum of its proper divisors (1).

55444457 is an equidigital number, since it uses as much as digits as its factorization.

55444457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224000, while the sum is 38.

The square root of 55444457 is about 7446.1034776586. The cubic root of 55444457 is about 381.3168922491.

It can be divided in two parts, 5544 and 4457, that added together give a palindrome (10001).

The spelling of 55444457 in words is "fifty-five million, four hundred forty-four thousand, four hundred fifty-seven".