55709553 has 8 divisors (see below), whose sum is σ = 76007008. Its totient is φ = 36275904.

The previous prime is 55709513. The next prime is 55709557. The reversal of 55709553 is 35590755.

It is a happy number.

55709553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55709553 - 2⁹ = 55709041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55709557) 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 in 7 ways as a sum of consecutive naturals, for example, 215800 + ... + 216057.

It is an arithmetic number, because the mean of its divisors is an integer number (9500876).

Almost surely, 2^55709553 is an apocalyptic number.

It is an amenable number.

55709553 is a deficient number, since it is larger than the sum of its proper divisors (20297455).

55709553 is a wasteful number, since it uses less digits than its factorization.

55709553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431903.

The product of its (nonzero) digits is 118125, while the sum is 39.

The square root of 55709553 is about 7463.8832386366. The cubic root of 55709553 is about 381.9236550554.

The spelling of 55709553 in words is "fifty-five million, seven hundred nine thousand, five hundred fifty-three".