55530553 has 4 divisors (see below), whose sum is σ = 59802148. Its totient is φ = 51258960.

The previous prime is 55530529. The next prime is 55530577. The reversal of 55530553 is 35503555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35503555 = 5 ⋅7100711.

It is an interprime number because it is at equal distance from previous prime (55530529) and next prime (55530577).

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 36144144 = 4403^2 + 6012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55530553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55530053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135778 + ... + 2135803.

It is an arithmetic number, because the mean of its divisors is an integer number (14950537).

Almost surely, 2^55530553 is an apocalyptic number.

It is an amenable number.

55530553 is a deficient number, since it is larger than the sum of its proper divisors (4271595).

55530553 is a wasteful number, since it uses less digits than its factorization.

55530553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271594.

The product of its (nonzero) digits is 28125, while the sum is 31.

The square root of 55530553 is about 7451.8825138350. The cubic root of 55530553 is about 381.5141640323.

The spelling of 55530553 in words is "fifty-five million, five hundred thirty thousand, five hundred fifty-three".