55408901 has 2 divisors, whose sum is σ = 55408902. Its totient is φ = 55408900.

The previous prime is 55408877. The next prime is 55408907. The reversal of 55408901 is 10980455.

55408901 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., 49773025 + 5635876 = 7055^2 + 2374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55408901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55408907) 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, 27704450 + 27704451.

It is an arithmetic number, because the mean of its divisors is an integer number (27704451).

Almost surely, 2^55408901 is an apocalyptic number.

It is an amenable number.

55408901 is a deficient number, since it is larger than the sum of its proper divisors (1).

55408901 is an equidigital number, since it uses as much as digits as its factorization.

55408901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 55408901 is about 7443.7155372838. The cubic root of 55408901 is about 381.2353631933.

It can be divided in two parts, 5540 and 8901, that added together give a palindrome (14441).

The spelling of 55408901 in words is "fifty-five million, four hundred eight thousand, nine hundred one".