55553009 has 8 divisors (see below), whose sum is σ = 58008960. Its totient is φ = 53133136.

The previous prime is 55552993. The next prime is 55553053. The reversal of 55553009 is 90035555.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55553009 - 2⁴ = 55552993 is a prime.

It is a super-2 number, since 2×55553009² = 6172273617908162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55553609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5849 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (7251120).

Almost surely, 2^55553009 is an apocalyptic number.

It is an amenable number.

55553009 is a deficient number, since it is larger than the sum of its proper divisors (2455951).

55553009 is a wasteful number, since it uses less digits than its factorization.

55553009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18039.

The product of its (nonzero) digits is 16875, while the sum is 32.

The square root of 55553009 is about 7453.3890949017. The cubic root of 55553009 is about 381.5655839385.

The spelling of 55553009 in words is "fifty-five million, five hundred fifty-three thousand, nine".