55552553 has 4 divisors (see below), whose sum is σ = 63488640. Its totient is φ = 47616468.

The previous prime is 55552547. The next prime is 55552573. The reversal of 55552553 is 35525555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55552553 is a prime.

It is a super-2 number, since 2×55552553² = 6172172289635618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55552573) 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, 3968033 + ... + 3968046.

It is an arithmetic number, because the mean of its divisors is an integer number (15872160).

Almost surely, 2^55552553 is an apocalyptic number.

It is an amenable number.

55552553 is a deficient number, since it is larger than the sum of its proper divisors (7936087).

55552553 is an equidigital number, since it uses as much as digits as its factorization.

55552553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7936086.

The product of its digits is 93750, while the sum is 35.

The square root of 55552553 is about 7453.3585047279. The cubic root of 55552553 is about 381.5645399244.

The spelling of 55552553 in words is "fifty-five million, five hundred fifty-two thousand, five hundred fifty-three".