55337509 has 2 divisors, whose sum is σ = 55337510. Its totient is φ = 55337508.

The previous prime is 55337507. The next prime is 55337521. The reversal of 55337509 is 90573355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40360609 + 14976900 = 6353^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 55337509 - 2¹ = 55337507 is a prime.

Together with 55337507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55337501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27668754 + 27668755.

It is an arithmetic number, because the mean of its divisors is an integer number (27668755).

Almost surely, 2^55337509 is an apocalyptic number.

It is an amenable number.

55337509 is a deficient number, since it is larger than the sum of its proper divisors (1).

55337509 is an equidigital number, since it uses as much as digits as its factorization.

55337509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70875, while the sum is 37.

The square root of 55337509 is about 7438.9185369918. The cubic root of 55337509 is about 381.0715576656.

The spelling of 55337509 in words is "fifty-five million, three hundred thirty-seven thousand, five hundred nine".