55365553 has 12 divisors (see below), whose sum is σ = 58712368. Its totient is φ = 52179120.

The previous prime is 55365551. The next prime is 55365641. The reversal of 55365553 is 35556355.

It is not a de Polignac number, because 55365553 - 2¹ = 55365551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55365551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35398 + ... + 36928.

Almost surely, 2^55365553 is an apocalyptic number.

It is an amenable number.

55365553 is a deficient number, since it is larger than the sum of its proper divisors (3346815).

55365553 is a wasteful number, since it uses less digits than its factorization.

55365553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1603 counting only the distinct ones).

The product of its digits is 168750, while the sum is 37.

The square root of 55365553 is about 7440.8032496499. The cubic root of 55365553 is about 381.1359200736.

The spelling of 55365553 in words is "fifty-five million, three hundred sixty-five thousand, five hundred fifty-three".